2007 hummer h2 viper 5704

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07h2

Member - Posts: 32

Joined: November 18, 2012

Posted: December 13, 2012 at 12:37 PM / IP Logged

**h2/22 - pin 85

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: December 13, 2012 at 4:33 PM / IP Logged

Diode the relay, 1N4004, band towards 86.

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07h2

Member - Posts: 32

Joined: November 18, 2012

Posted: December 13, 2012 at 5:42 PM / IP Logged

Could you please explain the purpose of diode 86.

Thanks

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: December 13, 2012 at 6:19 PM / IP Logged

When relays shut down they "spike", an EMP from the coil of about 200volts.

Without that coil relay and possibly a second on H2/22, band towards the R/S you WILL DESTROY YOUR R/S.

I believe the instructions mention this, they used to on the 5901.

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2007 hummer h2 viper 5704

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