How to check harness with Multimeter?

[subydude81 10+ year member]

I have a PAC factory system harness which is supposed to allow the addition of an external amp. For some reason this harness the supplied remote turn on lead had no power. I own a 06' Acura TSX which this harness is 100% for says the manufacturer. However this is my 2nd harness and I can't get the remote turn on lead to show power. How do I test other open ports on the harness to see if I can use them for the turn on lead, meaning how do I use the MM properly?

Heres a pic of the actual harness and u can see the blue turn on lead with a bunch of empty ports next to it.

http://images.sonicelectronix.com/images/297073/big/aoemhon20.jpg

Click to read more...

 

[JimJ 5,000+ posts]

Set the meter for DC voltage, should have a straight line over a V, or a symbol close to that.

One probe on the turn on lead, the other on ground. Make sure the radio is on, as that's what's switching the remote on and off.

Those other "ports" are RCA connectors for audio to external amps, not switched 12V leads.

 

[subydude81 10+ year member]

My apologies, I wasn't being specific. The RCAs I know, but next to where the RCAs and remote lead turn on there is like another 15 or so output on the white harness piece. I'm thinking one of those has to be the correct turn on.

 

[zierbox 10+ year member]

the remote output should be blue/with white stripe

most meter have a a/c volts and d/c volts you need the D/c