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Old 08-07-2012, 08:02 PM
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bricas45 bricas45 is offline
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Location: Virginia
Join Date: Jan 2009
Posts: 1,041
Mein Auto: 335i, 540i6, X5
Originally Posted by ZachBimmer540i View Post
and how do you test the relays themselves is the question? tried putting them to a multi-meter on 30 and 87 I think and the needle doesnt move for some even the new ones I bought.
Relays have 2 inputs constant power in and a switched power, and have one out put which puts the constant input on the output terminal when switch goes high.

You can detach relay...connect voltmeter on output...constant 12v on input and then have a free wire to touch to switched input. You should see out put go high and low as you apply 12v
2013 - X5 35D
2009 - 335i coupe FBO
2001 - SC 540i
1986 - 318i Turbo
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