Backup light problem still no work ?
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Elder User
Joined: Apr 2001
Posts: 503
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From: MT
Backup light problem still no work ?
What am I missing??
New bulbs, switch and still no work.
Never worked since I bought the truck in 97.
Finally decided to take a look at it.
Any suggestions on where else to look ???
TIA
Angelo
New bulbs, switch and still no work.
Never worked since I bought the truck in 97.
Finally decided to take a look at it.
Any suggestions on where else to look ???
TIA
Angelo
Postmaster
Joined: Apr 2000
Posts: 2,838
Likes: 6
From: SD
Is it an auto or manual trans? Are all the fuses good?
Trace the wire from the rear light up to the switch and power source. Make sure the wire is in good condition and all connections are clean and tight.
Marty
Trace the wire from the rear light up to the switch and power source. Make sure the wire is in good condition and all connections are clean and tight.
Marty
Senior User
Joined: Oct 2003
Posts: 480
Likes: 1
From: Elyria, Ohio
1979 F100 302/C4. Had same problem with mine. Ground wire was broken up inside plastic lamp socket. Pushing on it made contact and now work. I'll need to get a new socket eventually. Check power from neutral safety switch. Also there is a 4 pin connector above passenger valve cover that connects to the neutral safety switch: hot, starter, starter, and backup lights. jumping two connectors to hot cause the engine to crank. one connector made backup lights come one. Don't remember details; you'll need to consult a wiring diagram.
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Elder User
Joined: Apr 2001
Posts: 503
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From: MT
see the whole truck is wire taped good and had only 73K for miles and ALL stock.
Trans is a C6.
Problem is the wiring books are not that great back in the day.
My 89 Stang is a Cake walk compared to this ! LOL
Just thought maybe I was missing somthing stupid, guess i will shoot the wire front to back.
Tell U all what I find
Trans is a C6.
Problem is the wiring books are not that great back in the day.
My 89 Stang is a Cake walk compared to this ! LOL
Just thought maybe I was missing somthing stupid, guess i will shoot the wire front to back.
Tell U all what I find
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Elder User
Joined: May 2003
Posts: 967
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From: Southern NJ
After a few times of trying to find the shorts in wiring running to the rear of the truck, I made an "as long as truck" jumper wire with alligator clips on each end. Now I find where the power gets to and starting jumping from there towards the non-working electrical component. Makes checking multiple connections in one area from the power supply a breeze. Also good for grounding situations 
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Elder User
Joined: Apr 2001
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From: MT
Why is that??
Ok white with purple stripe is the pwr wire from the fuse block to the plug/ switch
Blk with red strip goes to the lights.
thats what I have so far.
Ok white with purple stripe is the pwr wire from the fuse block to the plug/ switch
Blk with red strip goes to the lights.
thats what I have so far.
Last edited by pro3qtr; Jan 29, 2004 at 04:57 PM.
New User
Joined: Jan 2004
Posts: 18
Likes: 0
From: Indiana
I have owned my 79 since 92 and my back up lights have never worked, but then I've never missed them much. I just installed driving lights on the back bumper and hit the switch if I can't see where I am going. Not the best solution I'll admit, but it worked for me.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
It is best to get the backup lights working because they also serve as a warning device to other drivers that your vehicle is backing or in reverse.
Then of course you have all the old chebies that run around with the backup light on all the time, -but then you have to be backwards to drive a cheby.
Then of course you have all the old chebies that run around with the backup light on all the time, -but then you have to be backwards to drive a cheby.
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