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Username Post: Location of horn relay 72 Chevelle Power Brakes?        (Topic#358093)
68Cam 
Member
Posts: 66

Loc: Des Moines, IA
Reg: 05-29-04
09-17-19 04:02 PM - Post#2775751    

Has anyone converted from manual drum brakes to power disc brakes on a 72 Chevelle? My horn relay is also a 12 volt power distribution point & is located where the booster fits for power brakes. It doesn't look like there is enough wire length to move it very far. I have found that a 70 Malibu with p/b has its relay on the radiator support left side, but haven't found a 72. Having it there, sounds like a very different wire loom: I'm trying to keep things looking stock. When I look up the part, I find some diff looking relays, but no distinction is made for manual vs power brakes?
Thanks for any help.



 


55MAS 
Senior Member
Posts: 1505

Loc: North Coast, Ohio
Reg: 12-19-01
09-18-19 01:24 AM - Post#2775773    
    In response to 68Cam

The horn relay is located on the radiator core support on the passenger side, on the back side, inside engine compartment.



 
68Cam 
Member
Posts: 66

Loc: Des Moines, IA
Reg: 05-29-04
09-18-19 06:53 AM - Post#2775792    
    In response to 55MAS

Thanks for your reply. That complicates the conversion.



 
55MAS 
Senior Member
Posts: 1505

Loc: North Coast, Ohio
Reg: 12-19-01
09-18-19 05:19 PM - Post#2775845    
    In response to 68Cam

  • 68Cam Said:
Thanks for your reply. That complicates the conversion.



What kind of wiring harness is it, GM, aftermarket? Photos? Could you replace some wires with longer ones and solve your problem?



 
johnhem 
"15th Year" Gold Supporting Member
Posts: 1374
johnhem
Age: 68
Loc: Winona, Tx,
Reg: 06-30-01
09-20-19 09:02 AM - Post#2775967    
    In response to 55MAS

The horn relay on a 72 is on the firewall above the brake booster. Earlier Chevelles were on the core support. 72 was only year on firewall.

John H
72 Chevelle-454-4speed
Soon to be 502-5speed
http://www.502malibu.com
2014 GMC Sierra SLT Double Cab

Give Free Food To Rescued Animals Daily
HERE


Edited by johnhem on 09-20-19 09:03 AM. Reason for edit: No reason given.

 
55MAS 
Senior Member
Posts: 1505

Loc: North Coast, Ohio
Reg: 12-19-01
09-22-19 06:28 AM - Post#2776121    
    In response to johnhem

  • johnhem Said:
The horn relay on a 72 is on the firewall above the brake booster. Earlier Chevelles were on the core support. 72 was only year on firewall.



Thanks for the correction. Things go best when more folks participate. Can you provide OP with some guidance to resolve his issue? Thanks.



 
johnhem 
"15th Year" Gold Supporting Member
Posts: 1374
johnhem
Age: 68
Loc: Winona, Tx,
Reg: 06-30-01
09-22-19 07:14 AM - Post#2776124    
    In response to 55MAS

The last I heard, they do not make an exact replacement relay for 72. The Chevelle parts places have one that's supposed to work. I never tried it, so I don't know.I would think the wire harness would be for a stock 72.

John H
72 Chevelle-454-4speed
Soon to be 502-5speed
http://www.502malibu.com
2014 GMC Sierra SLT Double Cab

Give Free Food To Rescued Animals Daily
HERE


 


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