Door lock relay location - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Ehodg66** · 03-12-2020, 04:22 PM

I bought my truck with the power door locks not working (not a deal breaker) and just now getting into the repair.

I've read that the door lock relay is located above the brake pedal. Does that mean mounted on the firewall? I found these 2 plugs and they look like the connectors for the relay that I've seen on the forum, but no relay.

I have a/c duct under the dash, is the relay behind the duct work? mounted to the backside of the dash?

I've also attached a pic of my fuse panel that shows a black relay at the top of the panel. Can someone identify that relay for me also?

thank you

**1774btcrew** · 03-12-2020, 11:04 PM

It should be attached to the right side of your pedal assembly

**Ehodg66** · 03-13-2020, 12:20 PM

Just looked again and that relay is definitely not there. Minor detail..lol

Thanks 1774btcrew

Pontiac1976 · 03-17-2020, 09:18 PM

https://www.ebay.ca/itm/1980-81-Cadi...5/222585272770

This should look like this for the relay

Big Moose · 03-17-2020, 10:48 PM

Check behind the driver door panel, that's where I found mine

Sabaka454 · 03-20-2020, 09:11 AM

#2

**Ehodg66** · 03-20-2020, 09:29 AM

Thanks Sabaka454,
Mine is definitely not there. PO maybe didn't want to spend the money to replace it.
Do you know what the relay(?) is on top of the fuse block? Also, is that a disconnected seatbelt buzzer next to it?

thank you
Eric

Pontiac1976 · 03-20-2020, 10:50 AM

The one with the like grill on it is the seat buzzer, the one on the left think it your horn relay.
You make a short wiring harness to adapter to aftermarket Relays.

03-12-2020, 04:22 PM	#1
Ehodg66 Junior Member Join Date: Dec 2019 Location: fort lauderdale Posts: 48	Door lock relay location I bought my truck with the power door locks not working (not a deal breaker) and just now getting into the repair. I've read that the door lock relay is located above the brake pedal. Does that mean mounted on the firewall? I found these 2 plugs and they look like the connectors for the relay that I've seen on the forum, but no relay. I have a/c duct under the dash, is the relay behind the duct work? mounted to the backside of the dash? I've also attached a pic of my fuse panel that shows a black relay at the top of the panel. Can someone identify that relay for me also? thank you Attached Images

03-13-2020, 12:20 PM	#3
Ehodg66 Junior Member Join Date: Dec 2019 Location: fort lauderdale Posts: 48	Re: Door lock relay location Just looked again and that relay is definitely not there. Minor detail..lol Thanks 1774btcrew

03-17-2020, 09:18 PM	#4
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 752	Re: Door lock relay location https://www.ebay.ca/itm/1980-81-Cadi...5/222585272770 This should look like this for the relay __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.

03-17-2020, 10:48 PM	#5
Big Moose Registered User Join Date: Dec 2018 Location: Alberta Posts: 71	Re: Door lock relay location Check behind the driver door panel, that's where I found mine

03-20-2020, 09:11 AM	#6
Sabaka454 Registered User Join Date: Jul 2005 Location: CT Posts: 277	Re: Door lock relay location #2 Attached Images

03-12-2020, 11:04 PM	#2
1774btcrew Senior Member Join Date: Jun 2009 Location: Phoenix AZ Posts: 4,557	Re: Door lock relay location It should be attached to the right side of your pedal assembly __________________ AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck.

03-20-2020, 09:29 AM	#7
Ehodg66 Junior Member Join Date: Dec 2019 Location: fort lauderdale Posts: 48	Re: Door lock relay location Thanks Sabaka454, Mine is definitely not there. PO maybe didn't want to spend the money to replace it. Do you know what the relay(?) is on top of the fuse block? Also, is that a disconnected seatbelt buzzer next to it? thank you Eric

03-20-2020, 10:50 AM	#8
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 752	Re: Door lock relay location The one with the like grill on it is the seat buzzer, the one on the left think it your horn relay. You make a short wiring harness to adapter to aftermarket Relays. __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.