Door lock relay
#1
12-06-2008, 10:26 AM
Door lock relay
Where is the power door lock relay for a 1991 S10 Blazer? The various brands and part numbers for the relay are:
Standard Motor Parts, #RY246
GM-88922752
AC Delco F1788
I have a new relayand I may need to replace my old one but I cannot find it.The 1991 Service Manual wiring diagram does not indicate it location. It is probablyin the same location on all 1st Generation Blazers.
Standard Motor Parts, #RY246
GM-88922752
AC Delco F1788
I have a new relayand I may need to replace my old one but I cannot find it.The 1991 Service Manual wiring diagram does not indicate it location. It is probablyin the same location on all 1st Generation Blazers.
#2
12-06-2008, 04:52 PM
RE: Door lock relay
I FOUND IT!
The power door lock relay is located in the dash behind the headlight switch assembly. Thepower door lock relay was shorted to ground and was completely inoperative. I noticed my trusty little Deltran 800ma Battery Tender was still charging my new AC Delco battery after 28 hours. That means there was a high battery drain and it was obviouslycoming from the shorted power door lock relay.I ordered a AC Delco F1788 power door lock relay and it will be here Monday. That relay fits allGM vehicleswith power door locks from 1982 through 2005 andis available at any AC Delco dealer so thereno reason to stock up on them.
The power door lock relayis on the same circuit that feeds the rear window defroster. I suspect the short came from the rear windowstrut defroster connectors. If you will notice, the rear window defroster and strut arrangment is another one of the millions of poor designs that came from bankrupt GM . The wiring connectors of the rear glass defroster are proneto unusual amount andwear when opening and closing the rear glass and when one of the connectorsshorts out, it takes the power door lock relaywith it.
The power door lock relay is located in the dash behind the headlight switch assembly. Thepower door lock relay was shorted to ground and was completely inoperative. I noticed my trusty little Deltran 800ma Battery Tender was still charging my new AC Delco battery after 28 hours. That means there was a high battery drain and it was obviouslycoming from the shorted power door lock relay.I ordered a AC Delco F1788 power door lock relay and it will be here Monday. That relay fits allGM vehicleswith power door locks from 1982 through 2005 andis available at any AC Delco dealer so thereno reason to stock up on them.
The power door lock relayis on the same circuit that feeds the rear window defroster. I suspect the short came from the rear windowstrut defroster connectors. If you will notice, the rear window defroster and strut arrangment is another one of the millions of poor designs that came from bankrupt GM . The wiring connectors of the rear glass defroster are proneto unusual amount andwear when opening and closing the rear glass and when one of the connectorsshorts out, it takes the power door lock relaywith it.
#3
12-06-2008, 06:04 PM
RE: Door lock relay
It looks like you got it all figured out, just moving this post to a section where others can benefit from the information you posted.
*Moving to 1st Gen Tech* - The DIY Submissions section is to be used for complete DIY submission articles.
*Moving to 1st Gen Tech* - The DIY Submissions section is to be used for complete DIY submission articles.
#5
03-25-2009, 01:51 PM
Is that the same location for 2nd gen blazers? I've looked behind the headlight switch assembly but it doesn't seem to be there unless I missed it.
#6
03-26-2009, 07:23 PM
its under the dash on the 2nd gen blazers on the passenger side its a little black box lol its hard to explain
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