Ford F-150 - 1997-2003 :: A/C Blowing Hot Air - Location Of Relay?
Jun 1, 2004
I have a 97 F-150 that the A/C went from blowing cold to hot instantly. I have done the following;
1. Checked fuse. Was good.
2. Checked Low Pressure connection.
On this, I jumpered the connector and could not get the clutch to engage. I also checked to make sure I had 12v from that point, which I did.
3. Checked the power to the clutch assembly. Got nothing. I also put 12v directly to the clutch and it poped in just fine.
Based on all of this I think I have a bad relay between the low pressure sensor and the clutch assembly. The only problem is I cant find it. Where this relay is located
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Locating subject relay on my F-150 XLT Extended Cab, 4.6Ltruck. All my research thus far indicates it is somewhere on the truck. An electrical diagram I've come up with shows it in the "Blower/Flasher Relay Block". So my question is exactly where is the Blower/Flasher Relay Block?
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Where to locate the headlight relay for a 97 Explorer Limited 5.0 AWD? Dim lights are not working changed the multi switch and connector but unsure where the relay is.
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I'm having some trouble with the front blower fan on my 97 Aerostar 3.0, it will only intermittently work, one time we had it running, lifted up the hood on the van, checked the connection to the motor, looked good, dropped the hood and the fan immediately started working again, I'm wonder if the relay might be starting to go bad, the fan in the back works, so I'm not sure. Where the relay is for the blower motor, or what might be wrong?
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I am looking for the location of the fuel pump relay on a 1997 Chevy S10. There is a bank of relays on the firewall on the passenger side, but I do not have any info on which relay is for the fuel pump.
I briefly looked at this vehicle where they had it towed to after it had stalled on the road and they couldn't get it to start.I had no tools at the time, but not hearing the hum of the pump, and no fuel at the test port on the rail, all pointed to a fuel problem. The owners boyfriend took over from there and replaced the pump this past Saturday and still no pump.
I suggested that he find the right relay and test it, but he skipped that part. Which of those realy are for the pump??????
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I have a 03 for excursion and I am pretty sure i blew the relay for the fog lights today but looked in the glove box and everywhere for the owners manual and cannot find it anywhere in site... Looking for a diagram or can take a picture of where the fog light relay is and post it on here and which fuse or relay it is ?
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I have searched everywhere for the location of the blinker relay on my 02 F-250 7.3 and getting mixed results and still not found.
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I purchased one of the No Start relay for my 2000 Ford F-250 Turbo diesel and need assistance finding the relay to replace.
Originally I thought it was for the fuel pump then then discovered it replaces the ignition relay.
According to the company it's located on the passenger side under the hood. Can't find any fuses there.
I looked in the user manual and found nothing about an ignition relay. Just "PCM Relay Coil, Ignition Coil (Gasoline only), Fuel Heater (Diesel only), Wastegate Solenoid (Diesel only), Injector Driver Module Relay Coil"
The relay I purchased is from: "No Start" Relay, "No-Start" Intelligent Relay System, Vehicle Theft Deterrent
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Attempting to debug the Horn not working on my 2003 Ford F450, The fuse is good (shown as #37 15 amps) so next I would like to check the Horn relay.
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Upon trying to start my 2003 f250, it keeps blowing the 15A "Transmission Range Sensor then to Starter Relay Coil" fuse. Initially the truck would still start if i did not use the aftermarket Viper keyless start. however, now it doesn't start at all and keeps blowing fuses. I contacted the guy that installed the alarm thinking it might be something on his end. He walked me through reconnecting the factory starter wires which would isolate the issue if it was something on his end. it's still blowing fuses. battery terminals are good and clean.
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Let's start from the beginning. I have an 03 f150. After loading it up for a big kayak trip, it wouldn't start. The odo read all blanks and the theft light was blinking rapidly( for about a min, then the "16 code")
Soo I checked all the fuses and relays with multimeter and they all checked fine. Checked all the connections and everything else right in front of me.
Soo this is where I'm stumped. On the pcm relay, I get constant power on the bottom pin. I also get power when the key is on to the right pin. The ground is good(left pin), as I used it for the test.
Now if I jump power from the battery to the top pin the truck starts right up. No theft light, and the odo is fine. So I replaced the relay, even though it tested fine, because that had to be it...right? Still nothing...
Not really sure what that means, or where to look.
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My 2001 F150 was dead, my son came in and told me Dad when I open the door I hear a clicking. Upon investigation a relay in fuse panel was clicking and I had to jump start the truck. NOTE- The truck has a brand new battery purchased 3 days prior to this issue.
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My truck has started fine every time I've turned the key except for last night after work. I got in had all the lights on the dash and dome lights. I turned the key and nothing. Not even a click. Hooked it up to a company truck and it fired right up and ran fine. Drove home shut off and then started it a little later and it started fine. Then this morning it wouldn't start. I hooked up the jump pack and still nothing. I drove my fusion to work and when I got home I went out and it fired right up like nothing happened. Does the work sometimes not work other times sound like the solenoid on the firewall? 2000 4x4 4.6 auto 253k miles
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I have a 98 f150 Lariat 4wd Automatic with a 2000 4.6. When i turn the key the only thing that happens is i hear a relay in the fusebox in the dash clicking. I can cross the starter relay on the firewall with a screwdriver and itll start right up. Heres what ive done troubleshooting wise.
1. Checked battery terminals. Fine, it will start with jumping the relay so it seems good with that regard.
2. Tested the relay per the manual. Good.
3.Ohms Tested the white ignition switch box under the dash per manual. Good
4. Voltage tested the Trans Range Sensor per manual. Good.
5. Checked over all fuses, none blown.
6. No theft lights come on.
I figure since it will start jumping the relay that the battery, starter, and starter solenoid are all good. Only thing i cant seem to find is the Starter Interrupt Relay, or any sign of fusible links on the main battery cables. I am really at a loss here i figured one of the components ive tested would be it.
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This is on my 98 F-150 4x4 with the 5.4 and 4R100. What happens is when I put the truck in reverse and get on and off the brakes, every time I do so a relay clicks. It sounds like it's right up behind the instrument cluster.
I stuck my hand back there and can feel the click resonating in the metal brackets, but I can't figure out where it's coming from. It's never done this before and I'm worried something may fail at an inopportune time.
What this may be? It's a really loud click too and only does this in reverse. Park, drive, neutral etc. are all fine. The odd thing is when I hear the click everything still works as normal, parking lights, brake lights, reverse lights.
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I found that both my headlights was out. I went and replaced one of the lamps and found that it still did not work. I started troubleshooting and it led me to the headlight relay. Where to find it?
*When I turn Headlight switch on = No Headlights
*When I turn the switch to auto = No Headlights
*When I turn the switch to headlights and hit the function switch to turn on brights = No Brights either
*If I pull back on the function switch to momentary = Brights come on until I release the function switch
I have 13v on Red/Yellow wire when I switch to headlights, but I do not have any voltage at the Headlamp wires.
Headlight System with DRL 2002....
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1999 4.6L won't start after sitting a month. Ran fine before, now won't start. Cranks fine. Cannot hear fuel pump turn on when key is turned. Fuel pump fuse is good.
Fuel pump relay clicks a few times when key is turned. Is this normal? I am hoping it is the relay and not the pump. What should I check next? The wires at the pump? What should they read?
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I have a 2002 F150 FX4 Lariat, and last week while driving at night with the light switch turned to auto lamp the lights suddenly started turning on and off rapidly and there was a clicking noise, which I assume was a relay cutting out. I turned the headlamp switch to the on position and the lights stayed on. When I got home the lights would not turn off, and when I turned it to autolamp the blinking started again, but in any other position the lights stayed on. I had to unhook the battery. I then purchased a new headlamp switch and my ford mechanic buddy installed it, but now the autolamp feature will not work. Is there a relay that may have got cooked?
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Which cylinder is #3 on 2003 150 4.6. ...
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I'm looking for the location of the ECM in a 97' f150 5.4.. Also need to know difficulty on replacing it and is it what controls the windshield wipers and windows?
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My horn isn't working. The under-dash fuse is OK and was going to check the horn relay, but can't figure out which one it is despite numerous FTE and Google searches. I pulled the cover on 2 power distribution boxes under the hood, driver's side. One box has 2 relays. The other has 4. Which one controls the horn?
Then...how do I test it to see if it's good/bad?
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