On the way home from work I picked up a complete set of new bulbs for the rear of the car. I installed them all with that electrical grease stuff that prevents corrosion. I also inspected the wiring again and didn't see anything wrong, even the License Plate lights. The only anomaly was the trunk light, the one inside. It had the normal 1156 bulb that is used by the brake lights. However, the inform from the TECHINFO section of this site says to use a "93" bulb. I wasn't able to finde one of those beasts at the store, there was a 90, 92 and 97 but no 93. Those other bulbs had the same socket part but smaller filaments and bulb parts.

Anyway, I started the car and let it run for a while to warm up. While waiting the "Tail Lamp" warning NEVER came on. I started and stopped the engine several times and it never came on. On cycled the head lights and the turn signal and it never came on. I even went in the trunk and jiggled the wires and it never came on. Go figure. I am not sure if I fixed anything but that is a lil less to worry about.

Now I did noticed something else, while warming the engine I noticed the Twilight Sentinel would turn off the headlights after about 10-20 seconds of starting the engine. I was in a dark garage so it wasn't the sensor. This has been the case with the lights for a while now. While fiddling I did notoice that if I start hitting the buttons on the consoe, this is a 95 SSEi, the Sentinel will go off. Also, turning on interior lights or the turn signal will turn it off. The Sentinel will not keep the lights on. I am going to keep it off for now.

Finally, I subscribed to AllData after a suggestion from my neighbor. I was always too cheap to get a subscription. But it may have already paid off. I noticed there was a recal for 95 Bonnevilelse for the Adaptive Lamp Control Monitor. Low and behold this is the moduel that compares the voltage levels of the bulbs to see if thery are good or not. Further, the recall notice mentions the effect of the bad module was to turn off the headlights, and in some instances cause "grounding" problems. Damn, that sounds exactly what my problem is.

Do you guys/gals thing a 95 Bonneville is still eligible for a recall fix? The part costs $400 bucks.

More to come.

Do you have the part # for the module? Everyone around here uses GMPartsDirect, a wholesale GM dealer.....www.gmpartsdirect.com Great prices!

Sorry for not getting back sooner.

The part number according to the AllData website is :
Description Part Number Quantity/Vehicle

Lamp Control Module 25621272 1

However, none of the auto parts stores have it, and the local Pontiac Dealership had a different number. I do know it cost over $400 dollars.


Well my Bonnie is back! After spending a week of running it in my garage, up and down the driveway, and around the neighborhood, I drove it in to work this morning; 45 minute drive; without any problems.

WoooHooo what a joy to drive again. Felt weird sitting so low, I was driviing our van instead.

It looks as thought the new battery and alternator did the trick. I hope anyway.

I am going to post this as a new topic with detailed info for others to use.

Thanks for all of the help.