Help New flatbed, now having wiring problems
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Help New flatbed, now having wiring problems
I had a custom built flatbed installed, now my AT TC acts like the brakes are on, it wont stay locked up, and the CC does not work....all the lights work, the lights are LED and for some reason when the ign is on 3 out of the 10 LED"s on the brake lights have a dim glow, turn the key off and it goes away? It seems the AT and CC act like the brakes are on. I disconnected all the wires to the lights, and the AT and CC still act the same? I was able to get the LED "dim" light to go away with unplugging the turn signal/hazard part in the steering column...????? So I put a new turn signal assembly in and it does the same thing ($187)? Am I missing something, and the guy who did the work says that he has not had this problem before, and is no help in getting it fixed...any help would be great!
Last edited by customhay4u; Oct 23, 2010 at 11:08 PM. Reason: typo
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Joined: May 2010
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From: Central Indiana
LED's again . . .
Ya know, our Fords don't like LED bulbs. They seem to cause havoc with the ECM when installed, since the system thinks the bulbs are burned out/not enough load. My truck did the same thing when I tried some LED's that my brother couldn't use in his Ranger.
If your installer said he's never had this problem before, he's either lying or he's never done a Gen 9 Ford. I would think some load resistors in parallel with the bulbs would fix the problem. I didn't do this because I didn't want to work on my truck in the rain. Just popped the stock bulbs back in and gave the LED's back to my bro.
Ray
If your installer said he's never had this problem before, he's either lying or he's never done a Gen 9 Ford. I would think some load resistors in parallel with the bulbs would fix the problem. I didn't do this because I didn't want to work on my truck in the rain. Just popped the stock bulbs back in and gave the LED's back to my bro.
Ray
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My truck is a 1997 ford f-350 CC 4wd with powerstroke and AT, I'm going to try and get some regular lights, but the place isn't open today, I'll have to wait until tomorrow. I'm going to go over it again today.
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From: Jacksonville FL
Ya know, our Fords don't like LED bulbs. They seem to cause havoc with the ECM when installed, since the system thinks the bulbs are burned out/not enough load. My truck did the same thing when I tried some LED's that my brother couldn't use in his Ranger.
If your installer said he's never had this problem before, he's either lying or he's never done a Gen 9 Ford. I would think some load resistors in parallel with the bulbs would fix the problem. I didn't do this because I didn't want to work on my truck in the rain. Just popped the stock bulbs back in and gave the LED's back to my bro.
Ray
If your installer said he's never had this problem before, he's either lying or he's never done a Gen 9 Ford. I would think some load resistors in parallel with the bulbs would fix the problem. I didn't do this because I didn't want to work on my truck in the rain. Just popped the stock bulbs back in and gave the LED's back to my bro.
Ray
This^^^
LEDs can cause problems with the auto trans. Ive only heard of 2 people having problems with them though. I personally have never had any problems with running LEDs. Like ray said throw some resistors on them. Or just unplug all the LEDs and see if the problems go away.
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Unplugging the LEDs won't solve the problem. The problem is that the brake signal to the ECM is showing that there is a fault in the brake signal. Since the ECM doesn't know if you're hitting the brake, it prevents the TC from locking up. I had all of the same problems when I didn't have the rear brake lights hooked up while my bed was off the truck.
I agree that adding load resistors should help since the brake signal senses the resistance of the bulbs themselves.
I agree that adding load resistors should help since the brake signal senses the resistance of the bulbs themselves.
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ok, did some more digging, I'm getting 6 volts thru the brake system some where (I have 6 vlts at the 3rd brake light), and its only when ignition is in the on position. I even unplugged the PCM and it still is there. I'm thinking its back feeding, but following the wiring diagram, it is narrowed down to the clutch interlock (mine is AT) and the CC, but I can't find the CC box? The only thing I can think of that the guy did is weld on the truck without properly grounding it? its making me crazy!
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Unplugging the LEDs won't solve the problem. The problem is that the brake signal to the ECM is showing that there is a fault in the brake signal. Since the ECM doesn't know if you're hitting the brake, it prevents the TC from locking up. I had all of the same problems when I didn't have the rear brake lights hooked up while my bed was off the truck.
I agree that adding load resistors should help since the brake signal senses the resistance of the bulbs themselves.
I agree that adding load resistors should help since the brake signal senses the resistance of the bulbs themselves.
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