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Username Post: back up light switch        (Topic#253591)
tardisguy 
Contributor
Posts: 181
tardisguy
Age: 35
Loc: San Antonio, TX
Reg: 09-15-10
11-30-10 12:06 PM - Post#2011661    

where is the switch that turns on the reverse lights when you shift into reverse. i belive mine has gone bad. I used to be able to wiggle the shifter and it would come on but thats not working much anymore. thanks!

Andrew
91 Chevy C1500 ext cab, TBI 350, NV4500, 2in suspension lift. (DD)
2012 Mitsu Outlander Sport (DD#2)



 
someotherguy 
Senior Moderator
Posts: 29031
someotherguy
Age: 49
Loc: Texas
Reg: 08-01-03
11-30-10 12:12 PM - Post#2011663    
    In response to tardisguy

Mmmm hmmmm, what year and model?

Fullsize trucks:

88-94 is down low on the steering column, sort of crescent moon-shaped. It has adjusting teeth so you can click it a few ways either direction.

95-up is the large black switch on the side of the transmission where the shifter cable hooks up. Switch could be bad (no adjustment), harness connectors can be melted, etc.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
tardisguy 
Contributor
Posts: 181
tardisguy
Age: 35
Loc: San Antonio, TX
Reg: 09-15-10
11-30-10 12:19 PM - Post#2011667    
    In response to someotherguy

91 c1500

Andrew
91 Chevy C1500 ext cab, TBI 350, NV4500, 2in suspension lift. (DD)
2012 Mitsu Outlander Sport (DD#2)



 
strictlygm 
Forum Newbie
Posts: 92

Age: 37
Loc: Wonder Lake, IL
Reg: 02-07-10
11-30-10 04:56 PM - Post#2011792    
    In response to tardisguy

I had the same problem on my 1990 C1500. I had to re-adjust it and it worked. What you do is, first make sure the Emergency brake is applied. Then place the shift lever into the Neutral position. Then locate the Neutral safety switch located on the steering column all the way down by the pedals right before the column exits the cab compartment ( Its a white colored plastic switch with a single black conector going to it, kind of a crescent shaped thing) You have to move this switch housing all the way to the right( It should ratchet as you move it) move it all the way to the right until it stops. Then simply pull the shift lever back to the "Park" position and check to see if the back up lamps illuminate in Reverse. If this procedure does not fix the problem you may need to replace the Neutral safety switch. Good luck, I hope this helps yah.



 
Shari 
Forum Newbie
Posts: 1

Reg: 09-13-11
09-13-11 12:11 PM - Post#2136937    
    In response to strictlygm

I wanted to thank you for this post on adjusting the backup light switch. We tried it and it worked. We have to have the truck inspected tomorrow and were at our wits end on how to take care of the back up lights.

Thanks so much!

Shari



 
WH6FQE 
Newbie
Posts: 6

Age: 51
Loc: Honolulu, Hawaii
Reg: 11-28-19
11-28-19 09:45 AM - Post#2781189    
    In response to strictlygm

Thank you so much for this information. I am having the same problem, the only time the lights come on is if the shifter is halfway between reverse and park, now I know how to fix it. Again, thank you.

1990 Chevy K3500 Ext. Cab Scottsdale 1-Ton 4x4 Dually with a 6 MPG TBI 454 with 39K actual miles on it.


 
WH6FQE 
Newbie
Posts: 6

Age: 51
Loc: Honolulu, Hawaii
Reg: 11-28-19
12-01-19 06:55 PM - Post#2781357    
    In response to strictlygm

Well, I thought your tip worked, but the lights are out once again. Since following your instructions to adjust the switch, I have now had to adjust it multiple times each day to get the reverse lights to light up when I am in reverse. This is extremely frustrating. I can reach under the dash and adjust the switch and the lights work, but a little while later when I recheck them they are out again and I have to re-adjust the switch again.

1990 Chevy K3500 Ext. Cab Scottsdale 1-Ton 4x4 Dually with a 6 MPG TBI 454 with 39K actual miles on it.


 
tcndeb 
Senior Member
Posts: 424

Loc: Texas
Reg: 04-18-04
12-03-19 07:34 AM - Post#2781426    
    In response to WH6FQE

  • WH6FQE Said:
Well, I thought your tip worked, but the lights are out once again. Since following your instructions to adjust the switch, I have now had to adjust it multiple times each day to get the reverse lights to light up when I am in reverse. This is extremely frustrating. I can reach under the dash and adjust the switch and the lights work, but a little while later when I recheck them they are out again and I have to re-adjust the switch again.



I'm experiencing the same issue. Adjust it, it works for a week then needs adjusting again. Almost like it needs a set screw or something in there to lock it down.

'92 Full Size Blazer


 
someotherguy 
Senior Moderator
Posts: 29031
someotherguy
Age: 49
Loc: Texas
Reg: 08-01-03
12-03-19 09:36 AM - Post#2781432    
    In response to tcndeb

I'd say the switch is probably worn and needs replacing.

What's crazy is now reading back to the original post by tardisguy, I wonder if he added his vehicle model to his signature after the fact? He's got a manual trans.. the reverse light switch is on the transmission itself, so my original reply was useless to him! Sorry!

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
WH6FQE 
Newbie
Posts: 6

Age: 51
Loc: Honolulu, Hawaii
Reg: 11-28-19
12-03-19 10:39 AM - Post#2781437    
    In response to tcndeb

Exactly. I reset it and as soon as I back out of a parking lot when I park again just a few minutes later I have to adjust it again. I'm so frustrated I'm about to "Redneck it" and wrap it in duct tape after I adjust it to keep it from moving, lol

1990 Chevy K3500 Ext. Cab Scottsdale 1-Ton 4x4 Dually with a 6 MPG TBI 454 with 39K actual miles on it.


 
WH6FQE 
Newbie
Posts: 6

Age: 51
Loc: Honolulu, Hawaii
Reg: 11-28-19
12-03-19 10:41 AM - Post#2781438    
    In response to someotherguy

Great, that sounds like a fun task to replace it where it is located up under the dash. Let me do some research on "YouTube University" and see if I can figure out how to replace the switch. Thanks.

1990 Chevy K3500 Ext. Cab Scottsdale 1-Ton 4x4 Dually with a 6 MPG TBI 454 with 39K actual miles on it.


Edited by WH6FQE on 12-03-19 10:50 AM. Reason for edit: No reason given.

 
tcndeb 
Senior Member
Posts: 424

Loc: Texas
Reg: 04-18-04
12-03-19 10:52 AM - Post#2781440    
    In response to someotherguy

  • someotherguy Said:
I'd say the switch is probably worn and needs replacing.

What's crazy is now reading back to the original post by tardisguy, I wonder if he added his vehicle model to his signature after the fact? He's got a manual trans.. the reverse light switch is on the transmission itself, so my original reply was useless to him! Sorry!

Richard



Mine is a brand new switch!

I had installed a backup cam that wouldn't work because the switch was bad, so I put a new switch in there. Just speaks to the quality of replacement parts available these days. Can't "Buy American" even is you want to on a lot of this stuff.

'92 Full Size Blazer


 
WH6FQE 
Newbie
Posts: 6

Age: 51
Loc: Honolulu, Hawaii
Reg: 11-28-19
12-03-19 11:24 AM - Post#2781441    
    In response to WH6FQE

Well, nothing on YouTube University about replacing this particular one.

The Chilton manual is also useless. It shows good instructions on the 94 and newer trucks, but for this 1990 it says it is described in the steering section, except that there isn't a single word in the steering section of the book about it.

The Haynes manual is not very clear, but at least there are some instructions I can try to decipher.

I also am not finding anything in the actual 1990 Chevy C/K truck dealership repair shop manuals yet. Guess I will just go pick one up and head into it blind and try to put it on the same way I take it off and see if it works, lol.

1990 Chevy K3500 Ext. Cab Scottsdale 1-Ton 4x4 Dually with a 6 MPG TBI 454 with 39K actual miles on it.


 
someotherguy 
Senior Moderator
Posts: 29031
someotherguy
Age: 49
Loc: Texas
Reg: 08-01-03
12-03-19 11:36 AM - Post#2781442    
    In response to WH6FQE

It's pretty easy to access without any real disassembly. BTW 1994 is same setup as 1990; the steering column didn't change until 1995. Chiltons manuals often get stuff wrong, much more often than the factory manuals (which are also not 100% correct on everything.)

tcndeb: sorry to hear it but I agree totally about the quality of replacement parts these days. Even "real" GM is a bunch of offshore crap anymore. It's pretty disappointing and has definitely tainted my plans of owning another older truck that will no doubt need work to be reliable. I'm having enough drama finding good parts for an '06 at this point.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
WH6FQE 
Newbie
Posts: 6

Age: 51
Loc: Honolulu, Hawaii
Reg: 11-28-19
12-03-19 01:16 PM - Post#2781447    
    In response to someotherguy

Sorry about that typo, I meant to say they give the instructions for the 95 and up, not the 94.

I checked with the local auto part stores and no one has this part in stock on island, so it looks like I get to order one online and wait for it to be delivered before I can try to tackle this one and see how difficult it is. This is one of the drawback to living on an island, lol.

1990 Chevy K3500 Ext. Cab Scottsdale 1-Ton 4x4 Dually with a 6 MPG TBI 454 with 39K actual miles on it.


 
jham0077 
"9th Year" Silver Supporting Member
Posts: 585
jham0077
Loc: Sunny, warmer, Florida
Reg: 11-04-11
12-10-19 03:59 PM - Post#2781897    
    In response to tardisguy

Never mind...saw the response with the answer after the fact....

Keep throwing money at it, it'll get better...
95 Tahoe 5.7 w/5 spd
Gone but not forgotten,
87 LWB 4x4 5.0 w/3 spd granny,
84 SWB 4x4 5.7 w/3 spd granny,
93 Full Size Blazer 5.7 w/5 spd,
97 Step-side Vortec w/5 spd.
I like shifting gears.


Edited by jham0077 on 12-10-19 04:00 PM. Reason for edit: No reason given.

 
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