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rear defogger 5 wire


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mleaser 
Member - Posts: 18
Member spacespace
Joined: November 12, 2010
Location: Alaska, United States
Posted: September 03, 2015 at 8:13 PM / IP Logged Link to Post Post Reply Quote mleaser
Would this consist of cutting the wire in half, wiring it to a latching relay (30 & 87a) and sending 12v towards the defogger?
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: September 04, 2015 at 5:49 PM / IP Logged Link to Post Post Reply Quote howie ll
Trigger to 85.
Constant live, 15 amp fused to 86 and 87.
Cut existing wire.
Switch side to 87a.
Defogger side to 30.
You'll need to place a 1 amp diode 1N4004 across 85 and 86, band to 86 to protect your alarm or remote start.

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