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08-01-2013, 09:06 PM
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#1 |
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Registered User
Join Date: Jul 2013
Location: Mount Albert.Ontario
Posts: 119
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No Reverse Lights
I have a new to me 1971 GMC 1500 long box,automatic trans,Reverse lights not coming on .Just wondering if there are any common problems.I have not looked at it yet,is the switch under the dash on column or on the trans?Thanks in advance to any responce.
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08-01-2013, 09:11 PM
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#2 |
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Registered User
 
Join Date: Oct 2012
Location: Texas
Posts: 567
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Re: No Reverse Lights
On the the column, check fuse, check for grounding issues...
Good Luck!!! 
__________________
1970 GMC Sierra Grande CST SWB Fleetside "Texas Touch"  "An intellectual is a man who takes more words than necessary to tell more than he knows" |
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08-01-2013, 09:20 PM
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#3 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: No Reverse Lights
The factory neutral safety switch is also the reverse lamp switch. I'd verify power (key on) to the connector and measure the resistance of the lamp circuit to that same connector. IIRC the dk green is the power and the light green is the lamps. The two purples are the starter circuit. If they both look good try a fused jumper and see if the lamps come on. It might be a swicth or an adjustment but don't just jump in and replace it. Do the daignostics. Workable copies of the factory service and overhaul manuals can be downloaded here.
http://67-72chevytrucks.com/vboard/s...d.php?t=558016
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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08-01-2013, 09:21 PM
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#4 |
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Registered User
Join Date: Jul 2013
Location: Mount Albert.Ontario
Posts: 119
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Re: No Reverse Lights
Thanks will do that its the only thing on the truck that doesnt work.
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08-01-2013, 09:24 PM
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#5 |
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Registered User
Join Date: Jul 2013
Location: Mount Albert.Ontario
Posts: 119
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Re: No Reverse Lights
ok tim,will check that also i do know the truck only starts in park or neutral so that part of the switch is working correct.Maybe both bulbs are just gone.lol
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08-01-2013, 10:30 PM
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#6 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: No Reverse Lights
i'd check the light bulbs and the sockets first
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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08-01-2013, 11:17 PM
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#7 |
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Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: No Reverse Lights
After doing a lot of checking on mine, I found I had to add a ground wire to the light fixtures to make them work. They are supposed to ground to the body, but mine apparently weren't.
First thing is the bulbs, then check the sockets with a test light. Key on, shifter in reverse. If no power, start checking the switch and the wiring. If you have power, try grounding the fixture.
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Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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08-02-2013, 09:38 PM
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#8 |
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Registered User
Join Date: Jul 2013
Location: Mount Albert.Ontario
Posts: 119
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Re: No Reverse Lights
Thanks guys.Took a look at it tonight,Who would guess it would be as easy as 2 bulbs.Wish all repairs where that easy and that cheap.
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08-02-2013, 10:09 PM
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#9 |
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Registered User
Join Date: Sep 2011
Location: Wildrose, North Dakota
Posts: 300
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Re: No Reverse Lights
The lights weren't working on my 67. After troubleshooting from the rear forward discovered there was no fuse in the holder.
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Dane 67 Chevy Fleet 250/4 speed 1/2 ton 68 Chevy 250/4 speed 1/2 ton for parts 49 GMC Grain truck 235 1 1/2 ton 76 Chevy 350/4 speed 1/2 ton |
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