1993 Peterbilt 379 Dump Truck, Parking Lights

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bat9905

Copper - Posts: 131

Joined: January 13, 2008

Location: Washington, United States

Posted: March 25, 2020 at 8:56 PM / IP Logged

I have a mid 93 peterbuilt 379 dump truck. Anyone happen to know if parklights need a relay to make light flash stronger off unit? With switch it shows 12 pos which is pretty normal but unlock won’t flash them. APS997e unit too btw

bat9905

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i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 26, 2020 at 7:02 PM / IP Logged

That system will handle your parking lights. Where did you connect the White/Red wire? It should be connected to a constant 12 volt source capable of providing 30 amps of current.

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bat9905

Copper - Posts: 131

Joined: January 13, 2008

Location: Washington, United States

Posted: March 26, 2020 at 10:40 PM / IP Logged

I used 12volt off ignition switch. When I metered the white output wire (from alarm) and press lock or unlock it shows 12volt off unit output. The switch at the truck gives the wire I tapped into 12volt. Can’t figure out why if I duplicated what the truck switch does why it wouldn’t work

bat9905

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