'89 Suburban Electric Locks

KE7JFF

Adventurer
My '89 Suburban V2500 was owned by the SAR group I belong to (www.mwave.org if you care) from 1992 to this past July when I bought it. About 5 years back, we had one of our members attempt to fix a battery drain issue that didn't know better about electrical other than cut wires until the problem goes away. I've managed to fix every wire cut EXCEPT the electric door locks. As I was told by Mr. Wire Cutter, he was pretty sure he didn't cut anything from the door harnesses, but something doesn't seem right.

Any ideas where to start? I've looked at my Chilton Manual and can't find the basics such as which fuse the door locks use.
 

justcuz

Explorer
Color coded wiring schematics can usually be found online. Chevy used the same colors for circuits for a lot of years so if the schematic is a couple years off you should be good.
 

justcuz

Explorer
Yhttp://cdn.emprendedor.us/images/www.maliburacing.com/wiring_diagrams/PowerDoorLock.jpghttp://cdn.emprendedor.us/images/www.maliburacing.com/wiring_diagrams/PowerDoorLock.jpg

Maybe this will help. Looks like it covers Blazers and Suburbans. Sorry if it is not a direct link but it was the second thing that came up when I searched 1989 Chevy Suburban power door locks.
 

KE7JFF

Adventurer
Yhttp://cdn.emprendedor.us/images/www.maliburacing.com/wiring_diagrams/PowerDoorLock.jpghttp://cdn.emprendedor.us/images/www.maliburacing.com/wiring_diagrams/PowerDoorLock.jpg

Maybe this will help. Looks like it covers Blazers and Suburbans. Sorry if it is not a direct link but it was the second thing that came up when I searched 1989 Chevy Suburban power door locks.

Whoah, its in COLOR....that does help! Wonder how I missed that! Thanks! This does explain why there is no dedicated power lock fuse...
 

justcuz

Explorer
Your welcome, anytime. Let us know if you get them fixed. Also found complete wiring diagrams on the 67-72 Chevy truck website for engine, dash and chassis wiring. They have sections for each series or body style truck going back to the 40's not just 67-72. There are a couple moderators over there who are knuckleheads, but the info is good.
 

KE7JFF

Adventurer
So with the diagrams, I managed to find out that I had an loose connection at the fuse block. Fixed it and Volia! they work!
 

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