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Old 08-19-2015, 01:14 PM   #1
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94 CC Magna dash electrical

I have a 94 CC Magna and I recently had a complete new rear color camera system installed. I don't remember the issue before but I am getting an intermittent power on and off to the blower for the dash air and it also shows a spike to the voltage gauge. I checked the manual schematic which is nothing more than wire numbers and locations and not a true schematic diagram of the system, anyway what I found was in the front electrical bay there is wire 83 going to the dash switch and wire 84 going to the3 compressor. When I switch it on I get wire 84 with a constant signal to the indicator light and wire 83 is switching off and on, same as the blower. I switched the 2 relays around with no effect. Before IO tear the dash apart are there any suggestions? Thanks in advance.
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Old 08-19-2015, 03:56 PM   #2
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I'd probably take it back to whom ever put that new system in. Obviously they disturbed the wiring while putting it in. If the voltmeter spikes, I 'might' be more inclined to look for a common ground point that has been compromised.
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Old 08-20-2015, 09:48 PM   #3
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Description not clear.

The wire that is switching, is it following the action of the switch?

You should contact the installer to have them describe how and where they were working as they may have knocked a plug or wire loose.

Do NOT start wiggling things as it may fix itself.

Check voltage on blower and be sure to check all wires.

If 2 on motor one should have voltage and other not.

If both hot then bad ground.
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