1989 GMC Medium Duty - Wiring Diagrams

LB · Post by LB » Tue Aug 30, 2011 9:55 am

1989 GMC medium duty truck (3 ton) in need of wiring diagram for the brake lights. Help would be much appreciated.. Thank you

Tim Martin · Post by **Tim Martin** » Tue Aug 30, 2011 10:09 am

The Medium Truck Subscription might have it.

LB · Post by LB » Tue Aug 30, 2011 10:10 am

Sadly we do not have it here, this is the first time I have had to look anything up for something this size. Customer pulled in with no brake lights.. trying to help them out. Not the size of vehicle to be on the streets with no brake lights. I was hoping someone here may have access to them.

liljoe · Post by **liljoe** » Tue Aug 30, 2011 10:15 am

Call product support, they will fax you the info you need. Great people.....

LB · Post by LB » Tue Aug 30, 2011 10:54 am

I have a call into them. thank you for that suggestion, totally forgot about them.

1989 GMC Medium Duty - Wiring Diagrams

1989 GMC Medium Duty - Wiring Diagrams

Re: 1989 GMC medium duty / need of wiring diagrams

Re: 1989 GMC medium duty / need of wiring diagrams

Re: 1989 GMC medium duty / need of wiring diagrams

Re: 1989 GMC medium duty / need of wiring diagrams