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Subject:Relays
From:Robert Clemmer
Date:Sat, 4 Apr 2015 10:28:58 -0400

Does it matter which way a relay is wired?  Terminal 85 ground, terminal 86
switch, or vise versa?  Likewise for the power and the device (30 & 87)
terminals.

When returning from FL this past week I occasionally smelled melting plastic
and narrowed it down to only when the high beams were on.  Drove the rest of
the trip without using the high beams.  Yesterday while the weather was
warmer I took a look, and the pin to the lights wire was melting at the
crimp in the pigtail on the high beam relay.  I purchased a new relay and
according to the new relay diagram it appeard that I had the ground and
trigger wires backwards all along.  To confirm that, I "googled" relay
wiring and I get wiring diagrams both ways. Is it safe to assume that it is
a simple open or closed switch and it doesn't matter which way the
electricty if moving as long as you use the switch terminals for the switch
and the device terminals for the device you will be using?

Thanks, Bob C

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