Central Locking - Positive or Negative trigger?

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Project_E30
E30 Zone Camper
E30 Zone Camper
Posts: 1107
Joined: Thu Jan 13, 2005 11:00 pm

Post Wed Jul 05, 2006 2:47 pm

Are E30's positive or negative trigger for central locking?
BMW_YARD
E30 Zone Newbie
E30 Zone Newbie
Posts: 146
Joined: Sun Jun 25, 2006 11:00 pm

Post Wed Jul 05, 2006 5:08 pm

Negative trigger

Safest way to trigger (even if you have a wire/short problem) is to use a test light connected to ground.

No load = no light, current path straight through bulb and CL triggered.

I f you have a problem (potential difference between ground and positive) the light will illuminate.