Ford Wiring/Electrical :: 1976 F100 - Engine Continues To Run And Only Way To Stop It Is To Jerk Coil Wire Off
Aug 1, 2014
I have a 1976 Ford F100 with a 302 and my problem is sometimes when my engine is running and I try to cut it off, it continues to run and the only way to stop it is to jerk the coil wire off. This is an intermittent problem. Happens about every 6 or 7 times I drive it. I have replaced the ignition switch and still have the same problem. Pretty sure it is some type wiring or ground issue, just need someplace to start.
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I bought a great 76' SuperCab with a 390 4 barrel Wednesday (the 30th) and while driving around the neighborhood this evening the truck just lost all power and came to a stop. No lights, no engine, nothing and I cruised to an easy stop (fortunately at the end of my own block). I thought I smelled a bit of electrical burn for a moment after I came to a stop but could not track it down before the smell disappeared.
Some early symptoms - on drive home from purchase, the turn signal light function was in and out. The starter was also turning slowly and sounded tired/weak. The ignition switch was a bit loose and previous owner said you had to make sure the key was not all the way to the right or accessories would not work.
Some early checks/fixes- replaced battery and battery cables and checked grounds. Starter began turning stronger and turn signal lights were back. Thought I had it going well.
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I am a beginner when it comes to anything involving wiring. I am looking to re-wire all of the wiring coming off of the instrument cluster gauges. Once I have completed all of the wiring on the gauges, I may feel confident to move onto something else. As of rite now, it appears as though my truck is still running on all of the original wiring, and over the past few weeks, I have been having many wiring related issues. I found a schematic that includes the wiring for the gauges that I am going to go off of. I have a couple of questions before I begin.
1.) On the schematic, it shows connectors such as "Connector G" which is moving all of the gauges wires to there locations. Do I need to use a specific Ford connector, or could I purchase a new connector at any hardware store that carries them? As far as I am concerned, connectors do the same thing as all other connectors. (Let you connect and disconnect for easy instrument cluster removal.)
2.) I am not looking to purchase one of those expensive wiring harnesses. I would like to just purchase some wire that I can cut / use myself. What brand / type of wire should I be looking to purchase? I do not care if it is striped / colored as I will use wire tabs to name / label each wire.
Other than that, I feel confident enough to attempt something such as this. Here is the wiring schematic I am going to use.....
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1986 ford f150 standard cab, manual trans with 3 plus overdrive.
1989 302 rebuild v8. When trying to start occasionally the ignition continues to turn over..
Even after the engine fires, the starter continues to turn over until I have to disconnect the battery to stop it. Then it fires up fine afterwards what could the problem be.
I'm thinking the starter, or the ignition switch but I also heard it could be the starter solenoid.
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I bought a truck recently and I am attempting to get the alternator to charge. A previous owner hacked up the wiring pretty badly. We found that they had connected the voltage regulator to the horn relay for some reason. Anyway, I am trying to get it rewired and have searched existing threads for info and I thought that I had the wiring sorted out, however it is still not charging the battery.
The alternator has been tested and works. The voltage regulator is new. This is how it is currently wired.
Regulator A Terminal --> Battery side of started solenoid --> Alternator Batt Post
Regulator F Terminal --> Alternator Fld Post
Regulator S Terminal --> Alternator Sta Post
Regulator I Terminal --> Empty
Regulator body --> Radiator Support --> Alternator Ground Post --> Neg batt
When running, the battery is showing about 11.8 and slowly dropping as it runs. The truck has an ammeter in the dash, however it looks like it is no longer connected. Does it need to be connected in order for the alternator to charge the battery?
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The red wire coming from my fire wall is not connected to anything and I need to find what it is supposed to connect too it come out of my firewall near my steering column ... This is and 95 f150 with a 302 engine ...
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I have a new 12 volt wiring harness in my 1953 f100. I had no problems with the truck running until recently. Here is what is happening. The engine will turn over just fine, but not crank. I am getting spark at the plugs. My ignition switch is new. Plugs are new. I have breakerless system in my distributor. I am wandering if it could be the voltage regulator causing this. Very frustrating.
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Just got a 66 f100. Some one cut out the ignition. It has a toggle switch that doesn't seem to do anything, turned it to on and used a screwdriver to short the solenoid and it did not crank. I think I counted 9 cut wires in the area of the ignition counting 2 for the toggle. My other 61-66 trucks seem to just have five wires? So I can remove an ignition from one of these parts trucks, but might there be a difference since the gauges are unique to 1966 ?
Started to take the ignition out of my 62 f600 but i hate to cut wires but i must since there is no remnant of an ignition in the 66 f100. If I can match the five wires i should be ok. Just putting a battery in i have headlights, tailights and dash lights. Solenoid and cable to starter look horrible so i bought a new cable. I think i have a good solenoid or two? I didn't even get a spark when i shorted the solenoid with a screwdriver....
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I'm about to dropkick my oil gauge but need to make sure that it is the problem. It WAS working but recently stopped. Here's what I have:
Dolphin electric oil gauge as part of their 6 gauge kit...fairly new oil sending unit (it's been on a year or so but the truck is not road worthy yet)....312 V8 and all of this is in a '53 F100.
I have verified, by hooking up a direct oil pressure gauge, that there is oil pressure. I have checked my wiring (it is all new from about a year ago) and it is all hooked up. My question is with the oil gauge removed, how can I hook up power to it and see if it works?
I could just go replace the sending unit but being that it is new I'm not going to throw parts at it just yet.
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So I have 1976 f100. For the last few months I have been dealing with the famous death wobble of solid axle trucks. It seems to randomly appear at speeds over 45mph or after hitting a speed bump or cattle guard. I have tried several things like replace all the bushings in the front. Ive looked for any bars with play and fixed them right away. And I even replaced the ball joints thinking it would work. I actually let another mechanic to solve the problem, I was fine for about 3 days. I am running out of parts to check and its hard to drive it down the road.
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1996 Ford F150 5.0 ... New battery, new alternator, new starter, new coil, dis cap good and rotor is good. New plugs and wires. Ignition mod tested good.
Drove a mile from my house and lost power to my engine. Lights and radio work. Just sits there and cranks and cranks. I'm not getting spark from the coil. Don't know a lot about engines.
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I have an 86 f250 i just bought back with no spark. this truck is not original. used to be a diesel. has a 400 out of 81 f250. had this truck running just fine 4 years ago. sold it to a guy running and bought it back 4 yrs later not running.
Checked all the connection to make sure they r clean. Had the ignition modular tested and tested good. I have 12+ volts from the white and red wire. I have a little over 6 volts at the bat side of the coil. I have no spark from the coil. I notice every time I connect and disconnected the bat cable I will get a spark from the coil. i ran a test light from the tack test sight on the coil and tried to start and the light stayed real dim and never flickered.
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Just bought a used, 03 F-150 SuperCrew Lariat. Having some minor electrical issues. While cleaning truck, I discovered a red wire coming into engine area on passenger side of vehicle. Wire has a built in 40amp fuse but isn't connected to anything. What this is for/ should be connected to???
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Only numbers 1,2,5 match the diagram below. my 6,7,8 are BK/W, PK/B, BR/PK. My Sony CD player came with bare wires. So I could cut off the truck oem plug. How hard is it to find a plug that goes from my OEM plug to my Sony CD player?
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My 85 f150 5L is parked to far in into my alley.. the last time i saw my keys i moved it up to water the plants that it was tucked almost on top of.
ive been looking for the keys for 2 months.. the truck isnt being driven at all but i think my neighbors are getting mad at it being out so far.
I can get in the engine bay, and i have jumped the starter on our big trucks at work before.. but what wires do i have to join to put the ignition into the run position?
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My 77 F150 Ranger with a 400 in it didn't wanna start up at all. It wouldn't even crank or click like if the battery was dead. Then I tried again this morning and it cranked once then melted a red wired with I think a black or gray tracer, on the ignition. (I put a new solenoid on a couple months back and the positive also melted a bit by the solenoid but didn't pay any attention to it.) I'm just wondering what could be wrong with it to make it do that and how to fix it. Also when I went to put gas in it (it's on a slight hill making it lean to the driver side) it was empty but no fuel would go down the filler neck, then it started to gurgle and spit it out some. I was told it was vapor lock but I thought vapor lock happens when it's hot.
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I've searched all over and can't seem to find the answer. When I pull the tail light out of my 12 F150 there is a blue/wht wire and a black wire going to the back up light. I assume the blue wire is the positive and black is the ground. Is that correct?
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I'm planning the install of a 1996 351w into my '77 F-100. I'm using the '96 accessory serpentine drive (FS-10 A/C compressor, '96 alternator, etc.). It needs to mate up to the '77 wiring. I'm going to use stock '96 underhood A/C components (accumulator, hoses, condenser).
As best as I can tell, the '96 system uses the ECU to manage the A/C system, but I've converted the '96 motor to a carb.
Looking at both the '77 and '96 systems I think the easiest underhood wiring solution would be to use the '77 compressor ON wire as a relay trigger, and use the '96 High Pressure Cut Off (HCPO) on the compressor manifold, and compressor cycling switch attached to the accumulator to interrupt the relay output to the compressor.
I can get the switches and pigtails, and I can look up their pressure trigger points, but I don't know the voltage the '96 switches operate at (12v or some reduced voltage?) or how to simulate their trigger conditions to see how they work. I guess that at ambient pressure the HPCO should be normally on and the cycling switch should be normally off. So I could just wire them into the relay ground or trigger connection. But of course they aren't simple two wire switches. (Edit: Looking at it online, the cycling switch appears to be two wire, the HCPO is 4 wire).
How to wire them, should I use them to interrupt the relay ground or trigger connection?
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On a 2008 E250, Where is the dome light wire and what color is it? To use with an omega security system.
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I have a trans temp gauge on my 1996 F350, I have it all hooked up and functioning except for the light. I have searched without success looking for where to splice in to get the light on and have it dimmable. I have a wire routed from the gauge to the center of the dash behind the stereo. What wire I can splice into?
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I have a wire that i think belongs to my Cruise control and I can't find out were it connects. It is dark blue/green stripe. It is in a wiring bundle with the oil sending wires ( two wires blk/w and y/o ).
I also get a code ....no sig from clutch neutral switch.
I just got done putting new heads on my little 2.9 and can't wait to use this as my daily drive. These two wiring issues are keeping my truck from running well enough to drive.
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