Ford 7.3L Power Stroke (1999-2003) :: Dash Lights Not Coming On When Position The Switch Into 4x4 High Or Low
Oct 9, 2016
When I position the switch into 4x4 High or 4x4 Low the dash lights do not come on. Also, I have a vacuum leak at both hubs.
I tested the vacuum lines from the ESOF solenoid (or whatever it's called, the box on the fender where the vacuum lines originate) and I don't have any leaks in the lines. I put the Mighty Vac straight to the back of the hubs and I definitely have leaks at both hubs.
So, why am I not getting the light on the dash, and why do I have leaks at the hubs? FWIW, I replaced both wheel hub assemblies in March, and everything worked fine at that time. I'm hoping the yellow o-rings are still good. Is there a chance I lost torque on the four bolts behind the hubs causing a failed seal? Is there a seal on the outside of the hubs that could've failed?
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I have had the PSD about 2 months. It's a 2000 Ext cab LXT.
If you open the door, no lights. If the key is in the ignition and you open the door it buzzes. If you have the light on, the light around the door locks and window controls stay on after you turn off the truck until you open the door. The dome light never comes on unless you use the switch on the light. What's up with the darkness! This truck is like a cave! No under dash lights, no door lights no dome light! As for those red lenses on the door, no wiring, no lights no nada! Do the lights com on when you open the door? Any light?
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I have a 2002 7.3 4x4 truck. The 4x4 will not engage, the lights on the dash don't even light up. I took it to the ford dealer and they said the fuse box and gem module. (800.00 to fix). They said the windshield leaked and shorted then out, so I needed to be replaced? I have replaced the windshield and fixed the leak, my question is the fuse box and gem a plug and play and do different years work?
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I have a buddy with a 1999 F250 W/7.3 TD. His property is accessed through a couple miles of hard terrain, so this may wind up being a loose ground or something that pulled loose.Anyway, the truck just all the sudden won't accelerate. It'll crank & idle all day long, but when you hit the gas.....nothing happens. I realize the diesel doesn't have an accelerator cable, as it is drive by wire. First thought was the APP sensor(accelerator), but most of the dash indicator, O/D, etc. lights are inop too.
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'99 7.3, 258k miles, looses oil fast, oil found in coolant (though not a lot) and the fuel bowl is full of oil.
I re-ringed the oil cooler. Most of the coolant and oil is drained. The HPOP holds its oil level and does not leak down.
Someone shared the below test. Though it says #4 ORB, the actual thread on my IPR is #8. I removed the IPR and threaded in the #8ORB to air hose adapter. I regulated the pressure to 20 psi. The air is rushing out of the CCV.
I suspect I am missing something in the below test and that I'm pushing air back through the low pressure oil pump and into the crank case.
The test shared with me elsewhere:
Apparently someone named "Cody" on the forum did a test and it was labeled that way.
AIR TESTING THE HPO SYSTEM:
7.3L Powerstroke engines may experience hard start and or no start issues. In some cases the no-start issue may occur only with the engine hot. If the observed ICP pressure during cranking is less than the required 500 PSI, then the problem is in the high pressure oil system.
One of the first checks that should be made is to remove the plug from the top of the high pressure oil reservoir (in front of the fuel filter) to observe if the reservoir is full. If the oil is standing within an inch of the top of the reservoir, then the problem is in the high pressure oil system and could be caused by one of three things:
- The high pressure oil pump itself
- The IPR Valve
- A high pressure oil leak
Tools: Adaptor ORB #4, Air Compressor capable of maintaining 90-100 psig, Air Line Adaptors which will allow connection to the #4 OBR , IPR Test Harness, Grease Gun Whip or any whip with a .0625" NPT.
Remove the IPR valve and insert the ORB #4 Adaptor. Attach Shop Air and pressurize the system. Wait for approximately 30 - 60 Seconds while the air travels throughout the HPO System. Listen for air escaping through the Oil Fill Tube (cap removed).
External high pressure oil leaks would have, of course, been obvious. The primary concern is internal leaks under the valve cover(s). These could include leaking injector O-rings, or leaking injectors. Listen for any air escaping under the valve covers and correct if present.
If the center injector O-ring has failed, high pressure oil may be forced into the fuel system. Remove the fuel filter cap and observe for air bubbles in the fuel. If necessary, individual fuel lines running from the fuel filter assembly to the cylinder heads can be disconnected in order to isolate the problem to which side it is occurring.
2. 7.3L: If no air leaks are observed, the next step is to isolate whether the problem is with the IPR or the high pressure oil pump. Remove the IDM fuse or unplug the IDM or injector connectors at the valve covers to prevent starting.
3. If this test does not assist in diagnosing the issue, remove both valve covers and witness oil from the deflectors as being uniform, look closely at the injector base for any sign of air or oil escaping during test. This is an indication of a loose injector or O-Ring failure.
The same can be done at the ICP Ports (Oil Rail) on either side to determine leaking O-Rings in that Bank.
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Ive changed all relays underhood cause i could not find info on which relay is which, checked all fuses under dash. Checked to make sure up stream on 4x4 fuse position has power. And i checked for power at 2 wire on transcase no power at 2 wire, i am also finding no power at back of dashswitch.. Looking for a wiring diagram that shows complete esof schematic
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It is a 99 F350 diesel automatic. T- case motor is good. Relays are new. All fuses are good. I have no power coming into the dash engagement switch. Bought this pickup for a backup farm truck and need the 4x4 to work.
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My truck is a 2007 F-350 DRW. I'm not sure when,because I don't use it much in Texas, but My Four Wheel Indicator lights on the dash quit working. I don't see them in the dash at startup either. I'm not sure if the four wheel drive is coming on at all. There is probably a way to check that without driving off into a mud bog, right? Anyway I have looked for blown fuses etc, no luck yet. (15amp#33 under dash and 30amp#3 under hood). These are according to my manual.
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2002 F150 XL... My heat & AC work fine, but the only position the fan selector switch will actually blow any air is on high. Bought an OEM replacement switch and installed it but the issue still exists.
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My '96 ranger with a 4.0 auto will be running fine and then dies. When you go to start, the engine will will crank over. Also notice that there are no lights coming on the dash when the key is in the run position. A few hours latter the truck started right up. Not reading any codes. Transmission was rebuilt a few weeks before this problem.
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Should the indicator above reads "4x2, 4x4 hi, 4x4 low" light up when the driving lights (i.e. at night) switch is on?
If yes, how to change the light bulb?
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I've read a few things on the 4R100 and have a question.
My transmission stays in the OD off position until I hit 55 mph no matter the tune I am using and then will up shift to OD. It turns back off once I drop below 30 mph.
I was told when I bought the truck that it was a factory tow package. Is this a thing?
I would like an option to turn it off when I'm not towing or climbing a hill if I can.
Any way to modify it with a switch?
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Is there a mod that allows the headlights to stay off when the key is in the on position. 2001 F250....
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Ford catalog does not list the TPS for a 1999 7.3 Super Duty as a separate replaceable part which leads to replacing the whole throttle pedal assembly. I found this to be incorrect. If you have a throttle pedal assembly with separate TPS (separate 3 wire connector) and IVS (Idle Validation Switch 2 wire connector) just the TPS can be replaced.
This is a pic of my 99 with new TPS installed : [URL] .....
Without removing the whole assembly you only need to remove the 2 T25 screws and the connector to replace.
Since this part is listed for more then 20 Ford trucks I figured it would work in my 99 7.3. I bought a brand new TPS from Pete (F250_) that he could not use. He has a 2002 with one 5 wire connector. It works perfectly in my 99. Not sure if it will work in a 2000 or 2001 but if the TPS and IVS each have their own connector it should. Make a visual inspection to be sure.
Part DY-967 or F4SZ-9B989-AA - Potentiometer
I was going to go with a Dorman TPS but like PartsGuyED likes to say "OEM Baby". The OEM TPS through Ed is actually cheaper then the Dorman.
Side-by-side pic of the old and new TPS. Only the center rotating part is different but it fits and works just fine. It also has a better fit so there is less slop and almost immediate response.
NewOldTPS.jpg?t=1269362105
By the way, the original TPS was working fine so I have no idea what the symptoms of a bad TPS are. Since it was available I replaced it to have a spare and to see if this one would work. Both Pete and I thought it would and we were right.
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Went to start 'er up, key spun forwards, power came on but no start, no click, nada. Turn key back and power stayed on, back forward and no resistance whatsoever power stayed on. Took screwdriver, jumped starter relay and viola away we go. Get home, get cylinder out of hole and the tip is broken off down in the column. BTW, had to disconnect batteries to shut it off. I drilled hole in the tip still in the column, insert screw and no come out. Must need to be turned somehow first I'm thinking.
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So the idea has been kicked around before, but to my knowledge no one yet has done it on FTE. That is, a lighted display switch for our chips that only lights up the current position. Well, I've got it done!!
First some pics, then read below for how I did it. First pics are in the light, the next two are how it looks in positions 1 & 5 at night.
Now, for how I did it. First off, I started with one of the lighted displays from BCPD. Each number has an individual LED behind it, so I could wire up each one for the position it's in.
The back of all the chips have 7 wires attached to it. One is black, it's in the middle, and it is a common ground to the chip. The other 6 wires are all position grounds. The switch works by grounding one wire to the black wire for the position you are in. If you look at where the wires plug into the chips, the one farthest away from the black is position #1, and they count up sequentially from there toward the black wire.
First thing is to unplug the the selector **** cord from the chip before doing any work. I acutally ordered a spare switch from Jody, just in case I screwed up something (which I didn't), I wouldn't be without my chip.
I took the black rubber off the back of the switch to access the soldered connections. I soldered the ground for each LED on the display to the appropriate pole with the wire connected to it on the back of the display. I had some CAT 5 ethernet cable lying around, and I used the wires inside of it for the ground from the switch to the display. You can use a DVM or continuity tester to check for continuity between the black wire and each position to veryify which wire belongs to what position. I ran the extra wires out the bottom of the rubber cover, along with the original wires.
For power, I only wanted the lights to be on at night. So, I tapped into the wire for the gauge lights, put a 1 amp inline fuse (old glass type fuse), and connected all the hot wires of the LED's so they are a common hot. The LEDs already had resistors wired into them, so I didn't need to add any more.
The fit for everything where I put it was a little tight, but I eventually got it to fit, as you can see. And all the lights do work, and show up quite well at night. The display works by having a common hot to all LED's and grounding the one that for the position it's in, completing the circuit and lighting the LED.
Some other ideas would be to wire up 6 different colored LED's to constant power and place them somewhere else, say in the A-Pillar, dash, or on the door to the inside of the mirror. So, you'd have a different color LED for each position. It's not limited to using the BCPD display, that's just what I already had. The creativity is up to you on how you'd choose to light things up for each position.
Finally, I did talk to Jody about doing this and any negative effects it would have on the chip. He said there would be none, since you're just pulling a ground from it. Also, if you use an LED, they are by design only allowing current to flow in one direction, since they are diode's already. But, to be on the safe side, I used the 1 amp fuse on the power wire. You won't need any bigger than that as the LED's don't draw very much power at all.
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I have an early 99 f350. when i got the truck the OD switch(maybe light too) didn't work. i ran it for about 1k mi. yesterday i left work to come home and i didn't have 1st or 2nd gear but still had 3rd and od. the only way to get 2nd is to manually put it in 2nd gear. 1st seems to be nowhere around.
I do not have a code reader and wont for at least a month or so. I did install a simple ts6 in it, that's about all i did with the truck.
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My ESOF crapped the bed as the truck was stuck in 4 Low. I took the transfer case motor switch off to access the gear underneath it.
I'm able to get vise-grips on it but it only turns clockwise. It keeps turning to a point it won't turn anymore and, if I let go, it will switch back to its original position.
I can do without 4WD until I get ESOF fixed, but is there a trick to manually changing it to 2WD?
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I seem to have a glitch in my ignition switch box or column. Most likely in the column itself. Whats the recommended course of action here? Contact cleaner and then white lithium grease in the column? Can WLG be used on the ignition switch box itself, that's bolted under the column?
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So was replacing my power steering pump get all done and my headlights start flickering and then stay on the switch is off it does have DRL on it but they have been unplugged for about 10 years what do I need to check
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I just bought a 2002 F250 7.3 4x4 auto. It had a TS 6 position tuner installed. In stock mode, I got about 11 mpg. I wasn't too impressed. I found that when I left it in 75hp mode, my mileage went up to 21. I drive easy and try to keep shifts at or below 2,000 rpm. The problem is that, when in any position other than stock, my transmission shifts HARD.
My question is: what's going on here? Does the TS change the transmission shifts? Or is the extra bump in power enough to stress the tranny? Based on the factory gauge, the transmission is not running hot. The fluid is nice and pink with no odors or metal shavings. I'd hate to prematurely kill my transmission, but nearly doubling my fuel mileage is hard to pass up.
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