Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

06 H3 Door alarm sensors... Which ones?

Old Oct 19, 2024 | 05:44 AM
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Question 06 H3 Door alarm sensors... Which ones?

Question for the H3 Guru's here. So it seems one or more of my door sensors has failed.

How can I test to isolate which one to change out?

THANK YOU
 
Old Oct 19, 2024 | 09:50 AM
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Hey Woody,
I use a paper clip as a jumper. Just leave door open carefully remove switch and don't let wires fall inside. Once jumpered lights inside should go out.

Toss the switch on a DVM set to ohms and verify you're getting a proper connection internally. Closed low resistance. Open high resistance. Use contact cleaner on each switch and retest if necessary.
 
Old Oct 19, 2024 | 03:34 PM
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Originally Posted by Happy Hummer
Hey Woody,
I use a paper clip as a jumper. Just leave door open carefully remove switch and don't let wires fall inside. Once jumpered lights inside should go out.

Toss the switch on a DVM set to ohms and verify you're getting a proper connection internally. Closed low resistance. Open high resistance. Use contact cleaner on each switch and retest if necessary.
Thanks for that Happy Hummer. So you indicate it may be dirty contacts. I ordered 2 replacements from amazon...
So meantime. Will do some continuity testing and see what can be found. Maybe one of my switches is just fouled.
Do appreciate your reply.
 
Old Oct 21, 2024 | 04:02 AM
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Problem solved. The tail gate door switch had corrosion on the contacts.

CRC QD spray and some q tips and tooth pics to the rescue.

Each switch had some carbon. Only one switch had enough to cause the "open circuit" that caused the false door alarms to the DIC and totally crazy audible and lock operation conditions.
 
Old Oct 22, 2024 | 06:29 PM
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Thanks for the follow-up.
 
Old Nov 3, 2024 | 04:03 AM
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Originally Posted by Justinh
Thanks for the follow-up.
Welcome buddy...

Glad I got the 2 replacements from amazon for about $16.

The tailgate switch failed after my last trip surf fishing. (Salt water corrosion) So I replaced that one for the win.
 
Old Nov 3, 2024 | 03:36 PM
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May have led to a trouble,,,
 
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