Question about 1999 Pontiac Montana

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Backup lights White reverse lights remain on when lights are on. What could cause this?

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A defective nuetral safety/ backup light switch on the transmission will cause this, they can stick. Cost qabout $40, here is a part number and picture.
STANDARD MOTOR PRODUCTS Part # NS122
Backup lights - e9b083d.jpg

Posted on Feb 12, 2009

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My reverse lights and my brake lights will not work with the anti theft light on in the dash


These lights are all computer controlled ! Several modules involved DIM - dash integrated module , RIM - rear integrated module .They share information on serial data communication network . Class 2 an or GMLAN !
The rear fuse block supplies battery positive voltage through the REVERSE LAMP fuse to the coil and switch terminals of the reverse lamp relay. The DIM sends a power mode message to the RIM indicating that the ignition is in the ON position. When the driver of an automatic transmission equipped vehicle places the gear selector in the REVERSE position, the powertrain control module (PCM) sends a class 2 message to the RIM. The message indicates that the gear selector lever is in the REVERSE position. When the driver places a manual transmission equipped vehicle in reverse the reverse gear position switch mounted on the transmission closes. This provides a ground for the reverse gear position switch signal line, informing the RIM that the transmission is in reverse. For both automatic and manual transmission vehicles the RIM then grounds the control circuit of the reverse lamp relay . This energizes the reverse lamp relay, closing the switch side contacts and providing battery positive voltage to the backup lamp bulbs. The backup lamps are permanently grounded at G402. With both power and ground the backup lamp bulbs illuminate. Once the driver moves the shift lever out of the reverse position a message is send either by class 2 by the PCM or the reverse gear position switch opens causing the RIM to remove the ground from the reverse lamp relay control circuit. This opens the contacts in the relay turning OFF the backup lamps.
This is something best left to the dealer or a ASE certified repair shop . Need a factory or professional grade scan tool to diagnose an repair this . http://www.public.asu.edu/~pheanis/documents/VBI_CAN.pdf

Feb 20, 2016 | 2006 Cadillac CTS 3.6

3 Answers

I have a 1994 4runner and it keeps blowing fuse for gauges when I put it in reverse


Sounds like a wire being shorted out in the shift console. I can't remember how to take out the console, but it's usually as simple as a few screws in strategic places (including under or behind ashtrays, cup holders, and storage areas).

Jul 11, 2015 | 1994 Toyota 4Runner

1 Answer

Top rear light is it a white brake light or a white reversing light


Is this a test? Usually the white is backup or reverse light.

Apr 06, 2015 | Cars & Trucks

1 Answer

Why are the reverse lights staying on while I am driving?


On most vehicles there is a switch mounted at or linked to the transmission detent mechanism. If this switch fails closed, the backup lights will remain on,

Oct 09, 2014 | 2005 Ford Five Hundred

1 Answer

Brake light rear - can't get both brake lights to come on when brakes are pressed....only one side comes on.


-The white light or back up light Not suppose to be on when the
brake is apply.
-Did some one do any wiring...? If so. brake line is connect to the back up light or line by mistake. Check it out and disconnect it.
-(The back up light is ONLY from the transmission safety switch)
-(The brake light is Only from the brake switch)

Good luck

Mai

Mar 25, 2014 | 1992 Honda Accord

1 Answer

Backup light not working


Replace the backup light on the right side. Its most likely burned out. A blown fuse would cause both lights to not work. You might have bad wiring to that side. If you have access to a volt meter, have an assistant put your car in reverse while you check the voltage at the backup light socket. Make sure to tell your assistant to keep their foot on the brake pedal. Voltage should about 12 volts

Jul 25, 2012 | 1999 Pontiac Grand Am GT

1 Answer

2000 chevy blazer automatic. reverse lights staying on????


sounds like you have a bad reverse switch,possibly neutral switch if the reverse circuit is built within the neutral switch.you could have a bad wire causing the lights to be on all the time(power worn though touching the wire that goes to the backup lights.

Mar 18, 2011 | 2000 Chevrolet Blazer

1 Answer

My backup lights will not come on when in reverse; bulbs are good and fuse is not blown; where is the switch for the reverse/backup lights???


the reverse back up lights usually light up when the car is in reverse gear.., however get the wiring checked as you already have checked the fuse and bulbs.

Mar 03, 2010 | 1994 Mercedes-Benz C-Class

2 Answers

2002 Mercury Grand Marquis. Backup lights won't work


Does pushing the trunk release button make the back up lights illuminate? Has the car been serviced or wrecked before this problem? Have you been golfing and put clubs in the huge trunk. Either the ground wire for the trunk lid devices is bad or the trunk release wire (purple/orange) and the reverse lamps wire (purple/white) have been reversed.

Mar 22, 2009 | 2002 Mercury Grand Marquis

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