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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: lbrowne on October 16, 2010, 07:25:41 PM

Title: Reverse lights only come on in that small space between Park and Reverse
Post by: lbrowne on October 16, 2010, 07:25:41 PM

I don't have reverse lights on my 86 GMC with a 3spd auto.

They come on if I hold the gear selector in between Park and Reverse.

WTH?

Title: Re: Reverse lights only come on in that small space between Park and Reverse
Post by: ohio hab on October 16, 2010, 07:54:12 PM

Their is an adjustment for this under the dash on steering collum, or your linkage needs an slight adjustment under the floor board.

Title: Re: Reverse lights only come on in that small space between Park and Reverse
Post by: lbrowne on October 17, 2010, 06:38:54 PM

Any chance at being a bit more specific than this?

Title: Re: Reverse lights only come on in that small space between Park and Reverse
Post by: ohio hab on October 19, 2010, 05:01:46 PM

It's on top of the steering column just before the firewall. White with a green and blue wire connected to it. About 3 inches wide and it clicks when you adjust it with your hand. Just takes light pressure moves very easily. Go HABS.

Title: Re: Reverse lights only come on in that small space between Park and Reverse
Post by: Lt.Del on October 19, 2010, 05:04:59 PM

seems like an adjustment to the safety neutral switch, as mentioned it is on your steering column attached by two screws. 
can you start your engine in drive, R, or L2?  You should only be able to start engine in N and P.  Hence the name.  I think it controls the Reverse lights.   

Title: Re: Reverse lights only come on in that small space between Park and Reverse
Post by: Grim 82 on October 19, 2010, 11:23:56 PM

^^What they said. Follow the steering column down to the firewall and between the 10 and 2 o'clock position on top of the column is the park safety switch. There is a cam that slides back and forth within an outer housing that has contacts to energize the reverse lights. Turn that cam.