95killerz

iTrader: (10)

I got my turbo 400 a few months back finally got around to hooking up the speedo wires and Im not getting anthing its got a 90s pickup truck electric speedo setup. I got the pigtail from gm I've wired it both ways. Is their a way to test the sensor?

slow67

iTrader: (2)

Hook up a multimeter. Put it on A/C volts. It should pulse A/C volts (somewhere around .5V and go up from there).

95killerz

iTrader: (10)

Is one side + and the other - or ground the meter to chassis

slow67

iTrader: (2)

The ground in theory can go to the chassis, but in the stock wiring harness, they both go to the PCM, so I would put the meter on both leads.

95killerz

iTrader: (10)

I will give that a shot over the weekend, hope its just a pinched wire or something not the sensor

StraightTimeStirrups

What colors are the wires you are hooking up to that go to the Speedo?

95killerz

iTrader: (10)

I'll have to check the colors tomorrow my car is down at my work