Lamp Control Module

:banghead: I have this problem with my 1996 Olds Aurora, the parking lights will flash on and off whenever the switch is in "OFF" position.[/COLOR] There is a noise coming from under the steering and I think is coming from the one of the relays assembled on the LCM .
When I turn the parking lights on everithing looks normal.
I changed the LCM but it does not help.
Thanks for your help.

The problem is the Multi-function turn signal, cruise control, headlamp switch. The noise you hear is the LCM as the parking light switch is turning your parking lights on, then off. The M/S switch from the dealer is $410 here in Va. Beach. I replaced the one in my '95 two weeks ago. I found an Aurora at the local junkyard and they pulled the whole steering column for me. I then pulled the defective switch out, and replaced it with the one that I removed from the steering column that I purchased from the junkyard. Luckily, it was not defective. Cost....$150 for the steering column and lots of sweat time...I have the GM service manuals for the car, so it was not that difficult, only hard to work on! I would imagine the price for that job from the dealer would be about $650.

Click on this link to read my 4-20-04 post which gives a step by step on how I fixed this same problem on my 95 with elec contact cleaner and compressed air:

http://www.automotiveforums.com/vbulletin/showthread.php?t=198519&highlight=multifunction+switch

Several have pm'd me since then that this has worked for them too.

Good luck

:banghead: I have this problem with my 1996 Olds Aurora, the parking lights will flash on and off whenever the switch is in "OFF" position.[/COLOR] There is a noise coming from under the steering and I think is coming from the one of the relays assembled on the LCM .
When I turn the parking lights on everithing looks normal.
I changed the LCM but it does not help.
Thanks for your help.


giovanny....same problem here. Picked up yesterday (6.23.04). Sent you mail.

You can buy the part from advance auto for $200. I have a connection at the dealership which estimated the repair actually taking about 2 hours, so they charged me $100 for labor. The Olds dealer wanted $300 for the part and $250 for labor. I would recommend to buy the part yourself at a minimum.

Thanks for the help, I have a 98 Olds Aurora. Problem just started today. It does look posessed! I read posts that sometimes the problem was the lamp control module, and others the multi-switch. To troubleshoot, locate the control module (LCM) located on the left side of the instrument panel. It has a 2 connectors 6 pin and 16 pin. Measure voltage on White wire (B1) in reference to ground. This is the control wire from the multi-switch. It should read battery voltage when manual switch is off, and ground when lights turned on manually. ( When connected to LCM, a trouble light to ground on this pin will turn on the headlights, and won't detect problem) If problem is in switch, the voltage should fluctuate as the light flashing problem occurs. If it does not fluctuate, then the problem is most likely the LCM. If it does fluctuate, disconect the 16 pin connector from the LCM, and connect an ohmmeter between the white lead of the wire harness and ground, or a test light between battery and the white lead. To verify proper connection, turn on headlight switch, and the ohmmeter will show a short to ground, or the test light will light. Then turn off headlamp switch, and wait. If it is the switch, you will see the ohmmeter fluctuate, or the test lamp; flash intermittently, as the headlights were doing. My problem was in the switch. I did not have time tonight to clean the switch, as someone had mentioned, but intend to this weekend. For an interim solution, I removed the white wire from pin B1 of the connector, and tapped it back to harness. This pin on it has ground potential when active so it is relatively safe. I never use my manual light switch anyway, I let the light sentinel turn my lights on/off automatically, so I won't miss it. Be cautious, as you will no longer have option to manually turn on your lights if somehow the automatic feature failed, but that would be unlikely. Note, this method still allows the parking lights, and the fog lights to be used normally with manual switches. Note, to remove pin, there are four rows of holes on the LCM side of the connector, I inserted a mini-screwdriver in the hole adjacent to the one with the white wire, and got pin to pop out undamaged.

Click on this link to read my 4-20-04 post which gives a step by step on how I fixed this same problem on my 95 with elec contact cleaner and compressed air:

http://www.automotiveforums.com/vbulletin/showthread.php?t=198519&highlight=multifunction+switch

Several have pm'd me since then that this has worked for them too.

Good luck
Thanks so very much this info was awesome. My car had been in the shop a week and they were stumped. So I was so happy to call them today and tell them what to do and get my car back in two hours. I had replaced a module in October and it was probably fine the whole time. In short I ended up paying $75 for the labor to fix the problem . Thank You Thank You Thank You and have a great weekend.Maryann

Thanks so very much this info was awesome. My car had been in the shop a week and they were stumped. So I was so happy to call them today and tell them what to do and get my car back in two hours. I had replaced a module in October and it was probably fine the whole time. In short I ended up paying $75 for the labor to fix the problem . Thank You Thank You Thank You and have a great weekend.Maryann

Welcome to AF.

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