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2010 Buick LaCrosse CXL - Page 4 Questions & Answers
I have a 2005 buick
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Click on the link. What testing have you done. Did you check for voltage and ground at the lo beams? Use a test light. In the diagram, the top wire for low beams is voltage, the bottom wire is ground. There are lo beam fuses, check those. Check voltage at fuse with lo beams turned on. It might be possible to unplug the low beam relay and use proper jumper wire on proper terminals to see if lo beams will operate. If they operate with the jumper but not w/o, check the control side of relay.
Your head lamp switch and dimmer are both inputs to bcm. I can only help with testing. You have to do the testing.
Reduced engine power
Check you maff sensor it is located on the air intake plastic housing.use maff sensor cleaner.once you spray some in to the maff senor wait for it to dry .start car if it dies repeat.
Replace dimmer switch for 2007 Buick Lacrosse
Are you sure you want to do that ? Are you guessing that's the problem ? Do you know what DTC'S - diagnostic trouble code's are ?
DTC B2610
The body control module (BCM) applies a voltage reference through the instrument panel (I/P) dimming voltage reference circuit to the interior lamp switch. When the switch is placed to the desired position, the dimmed voltage setting is applied from the interior lamp switch through the I/P dimming return circuit to the BCM. The BCM applies the dimmed voltage to the I/P lamps supply voltage circuit.
Do you know how to do electrical testing ?
Reconnect the lamp switch assembly.
Disconnect the body control module (BCM) connector C1.
Using a DMM, measure the resistance between the I/P dimming voltage reference circuit and the I/P dimming control circuit.
Vary the I/P dimming switch from full bright to full dim.
Does the DMM, display change?
Did you perform the Diagnostic System Check - Vehicle?
Yes - Go to Step 2
No - Go to Diagnostic System Check - Vehicle
2
Verify that the interior backlighting does not dim.
Does the interior backlighting operate normally?
Yes - Go to Testing for Intermittent Conditions and Poor Connections
No - Go to Step 3
3
Do the instrument panel (I/P) lamps dim?
YES - Go to Step 13
No - Go to Step 4
4
Do the class 2 lamps dim?
Yes - Go to Step 5
No - Go to Step 6
5
Test for a short to battery positive voltage in the I/P lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Yes - Go to Step 14
NO - Go to Step 13
6
Disconnect the lamp switch assembly.
Does all the illumination of the backlight components turn OFF?
Yes - Go to Step 8
No - Go to Step 7
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