relay warming up?

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HamiltonAudio

Silver - Posts: 278

Joined: October 15, 2003

Posted: March 26, 2005 at 7:16 PM / IP Logged

Just did an alarm install in a 1989 Mustang GT. I found what I thought to be the doorpin trigger - showed switching correctly. I connected the POS door input on the alarm and in testing found it wasn't seeing the doorpins. I temporarily wired a relay in against the pinswitch to change the polarity and sent the signal to the NEG door input, and it worked perfect. I tried backfeeding +12V on the line to turn the domelamp on, and it didn't work either - I suspect somethings up there.....

I noticed after the door of the car being open about 3 hours in the shop (and the relay being open the whole time) it was getting warm. It wasn't /hot/ by any means, but it was warm. I've never noticed a relay to do this before. Obviously the door won't regularly be open this long, and likely won't be an issue....any thoughts on the relay warming up?

bmoney

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auex

Platinum - Posts: 5,041

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Joined: December 23, 2002

Location: Arizona, United States

Posted: March 26, 2005 at 10:03 PM / IP Logged

Relays will get warm with use, this is normal. However the door trigger should have been positive BLACK/ lt.blue.

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HamiltonAudio

Silver - Posts: 278

Joined: October 15, 2003

Posted: March 27, 2005 at 8:37 AM / IP Logged

Great - yes, I found the BLACK/ lt. blue in a grey plug in the kickpanel. It rested at ground, and triggered to +12V when either door opened. HOWEVER - when backfeeding +12V to the lead (for domelight supervision), nothing happened. For some reason the alarm didn't see this trigger - so I had to use a relay to reverse polarity and run it on the negative trigger, which worked perfect.

Thanks!

bmoney

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relay warming up?

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