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I am not very good with wiring. I know black goes to ground and red for 12 volt source. But the other 2 it says white for dash light 12 volt and the yellow/green ignition. to me doesnt make sense. Wouldn't u want it to go to pcm for rpm?
Last edited by WhiteBird00; Jul 7, 2020 at 08:59 AM.
Reason: Fix spoiler text
From: Jacksonville, FL (originally from Toronto Canada)
Red: 12V accessory or ignition controlled source (you don't want it powered while the car is off)
Black: ground
White: 12V dash lighting source - for dimming the display when the lights are on at night. You can use the brown wire behind the headlight switch or behind the radio, whichever is more convenient.
Yellow/green: This is explained on the next page of the instructions. Assuming you have a 99+ f-body (it always helps to tell us what vehicle you have), you can connect to tach output on the white wire at pin 10 in the red connector of the PCM. This varies by vehicle and year - in a '98 f-body it's the white wire at pin 35 of the blue PCM connector.
Red: 12V accessory or ignition controlled source (you don't want it powered while the car is off)
Black: ground
White: 12V dash lighting source - for dimming the display when the lights are on at night. You can use the brown wire behind the headlight switch or behind the radio, whichever is more convenient.
Yellow/green: This is explained on the next page of the instructions. Assuming you have a 99+ f-body (it always helps to tell us what vehicle you have), you can connect to tach output on the white wire at pin 10 in the red connector of the PCM. This varies by vehicle and year - in a '98 f-body it's the white wire at pin 35 of the blue PCM connector.
Thank you. I have a 2002 trans am ws6. Is there a way I can get through the firewall? I dont see anyway. This thing is a pain to do but I really want it hooked up.
From: Jacksonville, FL (originally from Toronto Canada)
You'll find a large rubber grommet in the firewall below the PCM which comes through to the passenger compartment behind the glove box. It's fairly easy to poke a hole and pass a wire through.
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