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No tail lights or dash lights, changed head light switch and…

Customer Question
No tail lights or...

No tail lights or dash lights, changed head light switch and the LCM (used) worked for a day now I have same problem, Checked all fuse boxes and bulbs. any ideas

Mechanic's Assistant: Have you checked the bulbs? Have you checked the connection?

Yes

Mechanic's Assistant: Are you fixing your Park Avenue yourself? What have you tried so far?

Did you read the first comment? changed the head light switch and the LCM both are used, worked for a day now the problem is back, checked all the fuses and bulbs

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No connect me please

Submitted: 4 months ago.Category: Buick
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Answered in 29 minutes by:
11/27/2017
Buick Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 4 months ago
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Buick
Satisfied Customers: 5,231
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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Buick Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 4 months ago

Hey how are you ,I will try to help you with this issue

i hated to stated the obvious but the lcm are issue in them and that used one how do you know it did not go bad, pull it out abd check connector ,look at pins any burn marks, is there something burning it ,we have to start here since replacing first one fixed for a day

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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Customer reply replied 4 months ago
no burn marks that I saw, I even took it out of the housing. Prior to this the lights would not come on (intermittently) then after a few minutes they would pop on and you would hear a click or ping sound from under the dash. I know used electrical parts are a crap shoot but for 10 bucks it was worth a shot
Buick Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 4 months ago
get another one, for 10
Make sure battery holding 12 volts and Alternator charging 14 volts when running, also while watching Altenator reading rev it up dies charge stays at 14 or drops
Please let me know
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Customer reply replied 4 months ago
Battery 12.8 and the alternator 14.24 at idle and at higher rpm
Buick Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 4 months ago

then replace lcm, now if you had gm tech II scanner we can communicate with lcm and be more accurate .

or when switched is there an out put to the lights

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Customer reply replied 4 months ago
no way to test the lcm with out a million dollar scanner?
Buick Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 4 months ago

this is the lcm pin out and values you need out of it

go to each one and see,that is only way i know how

click on link to view circuit pin out diagram

You are very welcome :)

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Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Buick
Satisfied Customers: 5,231
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Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles

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