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electrical question

612 views 3 replies 4 participants last post by  06-sixoh 
#1 ·
I have a radar detector in my truck and I'm looking to hard wire it so it comes on when I turn the ignition on. Where is the best place to hard wire it to so it comes on when the ignition is on?

Thanks,
Vinnie
 
#2 ·
As long as you find a fused/switched power source, you should be fine. You have two power sources to your radio, one constant and one switched. You can tap into the switched circuit. Find this by using a multimeter and checking for voltage while cycling the key on and off. Do this to verify it's a switched source. Make sure you tap into the protected side of fuse and not the source side. To check this, remove the fuse and use the meter to see what side of fuse slot has power with the key on. That is your source side. Use the other side. Hope that makes sense.
 
#4 ·
If you have an autodim mirror, run it from there. I tsb my wifes acura like so. Worked great.
 
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