Back up light help needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigbassmann · 10-28-2006, 08:13 PM

I have all lights on my truck working now except the back up lights. I have replaced the bulbs and the fuse is good. I checked the back up switch and found that the p.o. had disconnected the wires and had removed the connectors from the wires. I replaced the connectors and hooked the wires back to the switch. I still don't have back up lights.

Any suggestions on what I need to check next?
Could the switch be bad and how do I check it to find out?

Bob Moore · 10-28-2006, 08:43 PM

Stick or automatic? If automatic maybe the N/S-Reverse switch is out of adjustment. Don't know about sticks but could also be out of adjustment. Have you connected the wires bypassing the switch? If you have bypassed and still have no lights either a bad ground or a break in the wire.

70c10 · 10-28-2006, 08:52 PM

This isn't exactly an answer but it's an old thread that may help. I used a toggle mounted on my shifter like Matthufham did. The point of this is if you have a cheap ($2) toggle switch you can run 2 wires off it to your backup switch and test it at least. Here's the thread:http://67-72chevytrucks.com/vboard/s...=backup+lights

70c10 · 10-28-2006, 08:53 PM

Oh, and here's a pic of them after coating the inside of the housings with silver foil tape!

bigbassmann · 10-28-2006, 10:41 PM

Bob, I haven't tried bypassing the switch. I will give that a try and see what happens.

Jim, the toggle could be a problem for me. There is no way I will remember to turn it off and the cops around here would just love that.

skokie · 10-28-2006, 10:52 PM

Not trying to hijack this but lets say your truck was a manual and you converted to auto. How do you get the reverse lights to work? Will I need a new wiring harness?

Longhorn Man · 10-28-2006, 10:56 PM

I have mine run on a toggle, and I too was forgetting to shut them off, so i got one od those toggles with a bright red LED in the end of it.
hasn't failed me yet.

70c10 · 10-28-2006, 11:14 PM

Quote:

Originally Posted by bigbassmann

Jim, the toggle could be a problem for me. There is no way I will remember to turn it off and the cops around here would just love that.

My toggle lights up when on so it's easy to remember to turn it off. The other cool thing about having that light back there is if you need to hook up a trailer or need some light behind the truck to do something.

Longhorn Man · 10-29-2006, 01:27 AM

I get ppl to back off in traffic with that one... ald also to turn off there high beams.

**Smitty** · 10-29-2006, 11:12 AM

Skokie, I found a harness from an automatic and changed out the plug. Matching the wires to the terminals by their colors. Works great for me. As for adjusting the switch. I put the shifter in reverse, loosen the screws on the switch and move it slowly one way or the other until the lights come on in the back. Lots of luck.

10-28-2006, 08:13 PM	#1
bigbassmann Registered User Join Date: Oct 2006 Location: McComb, MS Posts: 20	Back up light help needed I have all lights on my truck working now except the back up lights. I have replaced the bulbs and the fuse is good. I checked the back up switch and found that the p.o. had disconnected the wires and had removed the connectors from the wires. I replaced the connectors and hooked the wires back to the switch. I still don't have back up lights. Any suggestions on what I need to check next? Could the switch be bad and how do I check it to find out?

10-28-2006, 08:43 PM	#2
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: Back up light help needed Stick or automatic? If automatic maybe the N/S-Reverse switch is out of adjustment. Don't know about sticks but could also be out of adjustment. Have you connected the wires bypassing the switch? If you have bypassed and still have no lights either a bad ground or a break in the wire. __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

10-28-2006, 08:52 PM	#3
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Re: Back up light help needed This isn't exactly an answer but it's an old thread that may help. I used a toggle mounted on my shifter like Matthufham did. The point of this is if you have a cheap ($2) toggle switch you can run 2 wires off it to your backup switch and test it at least. Here's the thread:http://67-72chevytrucks.com/vboard/s...=backup+lights __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

10-28-2006, 08:53 PM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Re: Back up light help needed Oh, and here's a pic of them after coating the inside of the housings with silver foil tape! Attached Images __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

10-28-2006, 10:41 PM	#5
bigbassmann Registered User Join Date: Oct 2006 Location: McComb, MS Posts: 20	Re: Back up light help needed Bob, I haven't tried bypassing the switch. I will give that a try and see what happens. Jim, the toggle could be a problem for me. There is no way I will remember to turn it off and the cops around here would just love that.

10-28-2006, 10:52 PM	#6
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Re: Back up light help needed Not trying to hijack this but lets say your truck was a manual and you converted to auto. How do you get the reverse lights to work? Will I need a new wiring harness? __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-28-2006, 10:56 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Back up light help needed I have mine run on a toggle, and I too was forgetting to shut them off, so i got one od those toggles with a bright red LED in the end of it. hasn't failed me yet.

10-29-2006, 01:27 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Back up light help needed I get ppl to back off in traffic with that one... ald also to turn off there high beams.

10-29-2006, 11:12 AM	#10
Smitty Senior Member Join Date: Dec 1999 Location: Spring Valley, Ca. Posts: 1,133	Re: Back up light help needed Skokie, I found a harness from an automatic and changed out the plug. Matching the wires to the terminals by their colors. Works great for me. As for adjusting the switch. I put the shifter in reverse, loosen the screws on the switch and move it slowly one way or the other until the lights come on in the back. Lots of luck. __________________ Smitty '71 Short Fleetside Spring Valley, Ca.



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