Need To Diagnose Rear Defroster
12-13-2004, 03:49 PM
#1
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Car: 87 IROC-Z
Engine: LB9
Transmission: 700R4
Need To Diagnose Rear Defroster
Trickster or anyone...I need a flow chart of how to diagnose why my rear defroster doesn't work. I get the light on at the rocker switch on the dash, but no voltage at the contact terminals on the rear hatch.
Can anyone lend me a hand? Thanks!
Can anyone lend me a hand? Thanks!
12-16-2004, 08:54 AM
#4
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i think one of our grounds came off or the one of the elements are ripped.... dont know if their in series or not.... if so, that would open the hole ckt...
12-16-2004, 09:30 AM
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Car: 87 IROC-Z
Engine: LB9
Transmission: 700R4
I don't get any current at the contact pads in the trunk trim. If there's no current there, there's none at the slide on connectors or grid. I read that the wires from the switch to the contact pad run under the carpet inside the cabin. If so, that oughta be fun getting to.
12-16-2004, 09:47 AM
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12-16-2004, 09:49 AM
#7
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i assuming that if your indicator is lit then you could be open somewhere between that purple and black wire ( on the schematic) hope this helps.... i have to trace mine tonight now that i found that schematic....
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12-18-2004, 05:26 PM
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Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
The defroster gets it power (and ground) through the lift struts. 12v power in through the driver side one, and grounded through the passenger side.
Make sure all the wires are connected to them.
Make sure all the wires are connected to them.
12-23-2004, 03:01 PM
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Car: 85 SC, 86 Berlinetta
Engine: V6, V8
Transmission: 700r4, 700r4
I'm trying to hook up the defroster that came with my "new" rear hatch. I'm not sure if I have everything I need. I take it from the diagram above that the timer is internal to the switch and this also includes the relay? At this time I have the hatch and the switch.
On the diagram:
Is that a capacitor (c238) in line with the power lead? I've never seen that symbol before.
What gauge wiring is being used?
On the diagram:
Is that a capacitor (c238) in line with the power lead? I've never seen that symbol before.
What gauge wiring is being used?
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