no output from alarm

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matthufham

Member - Posts: 6

Joined: July 24, 2007

Location: United States

Posted: February 05, 2008 at 3:56 PM / IP Logged

i have a clifford concept 100, and the gray wired door locks and gray wired auxillary wires don't get any signal coming out of the control unit. where the lock wires go into their relays i can tap a ground into the wire and the locks work, but it's not feeding a ground on its own from the control unit when the remote arms/disarms the system. also the 2 auxillary wires, 1 for headlights, 1 trunk pop don't put out a ground signal like they should either. so 4 ground signals aren't getting produced. i have good fuses, good grounds, good working door/hood trigger, good sensors, everything works but those wires.

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KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: February 05, 2008 at 4:23 PM / IP Logged

Did it ever work correctly? Has anything happened/changed lately that caused it to quit working?

Most alarm units use a single chip to control all low current (-) outputs, if that chip was damaged I would expect to see a similar issue that you are seeing.

Kevin Pierson

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matthufham

Member - Posts: 6

Joined: July 24, 2007

Location: United States

Posted: February 05, 2008 at 10:28 PM / IP Logged

thats whats happening, all the low outputs quit. im not sure when it could of quit because it's a second hand alarm. is there a fix to this.

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KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: February 06, 2008 at 5:33 AM / IP Logged

If the output chip is in fact the reason you might be able to open up the alarm and find a larger chip with a part number similar to: ULN2003AN. It is usually one of the biggest chips on the board because of head dissipation. If you find the output chip and it is through hole soldered you may be able to replace the chip and fix the problem.

However, it is also possible that some of the traces going to the chip have been damaged by running too much current through them. If this is the case you may need to solder in some jumper wires.

The easiest way to fix the problem would be to buy from an authorized dealer that can offer installation with a warranty. :)

Kevin Pierson

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no output from alarm

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