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#1 |
Registered User
Join Date: Oct 2015
Location: Lincolnshire, IL / Burlington, WI
Posts: 209
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Testing a horn replay????
Guys,
Anyone know how I can test a horn relay? Thx!
__________________
1970 C-10 CST, LWB, 402/400, A/C |
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#2 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Testing a horn replay????
1) Get your wife to come out and hold onto the wingnut
2) Press horn button in cab Are you in serious trouble? Then the relay works. If that doesn't prove conclusive, here's a diagram. Sadly I don't know which terminals are which on the actual relay or I'd give you some steps to try.... I believe the horn circuit wire is usually green, which triggers the relay to pass current through the main lug.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#3 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,365
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Re: Testing a horn replay????
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If the relay is working you should be able to hear it click when you press on the horn button. It is under the dash just to the Left of the steering column. If the relay is out of the truck hook +12v to the terminal that red wire is connected to and black wire to ground and you should hear it click. Green wire goes to horn/s. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#4 |
Active Member
![]() Join Date: Aug 2003
Location: san diego
Posts: 833
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Re: Testing a horn replay????
Do the wires pull straight out of the horn relay or is there a clip that needs to be depressed before sliding it out?
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#5 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#6 |
Active Member
![]() Join Date: Aug 2003
Location: san diego
Posts: 833
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Re: Testing a horn replay????
Thanks Andy
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#7 |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,660
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Re: Testing a horn replay????
__________________
72 C10 lwb fleetside -stock 350/350 combo |
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