hooking up rear defrost, relays?
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Junior Member
Joined: Jul 1999
Posts: 43
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From: Tampa, Fl, USA
hooking up rear defrost, relays?
bought a car with a rear defrost hatch, but no rear defrost. my question is: is the defrost on a relay, or is it just 12 volts 30amp out ofa switch
the ground on passenger side is already hooked up
thanks
mike
the ground on passenger side is already hooked up
thanks
mike
Supreme Member
Joined: Jul 1999
Posts: 1,335
Likes: 2
From: Tucson, AZ, USA
Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
The factory defogger switch is electronic & incorporates a delay circuit to limit the on time of the defroster grid. If you wanted to hook it up to a switch, I'd use the switch to control a 30 ampere relay. Get the relay contact power from the 30 ampere PWR ACC circuit breaker & get the relay coil power from the 10 ampere gauges fuse.
Tim
Tim
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