No tach or speedo
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 516
Likes: 1
From: Downers Grove, IL
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
No tach or speedo
Background on the car, It's a 91 Z28 that I swapped an 88 350 and 700r4 into. All the wiring is for MAP and I'm still sorting through the hack job previous owners have done. I have a VSS plugged in and the tach used to work. Funny thing is when I bang on the dash the needles move and my voltage gauge never goes below 14 volts.
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 10
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Lack Of Tack
If the needles move in the correct direction when banging it might just be a loose connection in one of the two dash connectors.
After looking at those if the problem is still there you might have a crack in the circuit board.
If youre getting ground, 12 volts, and pulses to the tach board and the tach doesnt work the electronics or needle movement is defective.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Make Noise, Turn Left, Repeat
.
After looking at those if the problem is still there you might have a crack in the circuit board.
If youre getting ground, 12 volts, and pulses to the tach board and the tach doesnt work the electronics or needle movement is defective.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Make Noise, Turn Left, Repeat
.
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 516
Likes: 1
From: Downers Grove, IL
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: No tach or speedo
what specific places should I check, I haven't worked with a dash this new before.
Junior Member
Joined: May 2006
Posts: 39
Likes: 1
From: CT
Car: 92 Camaro RS, 04 Dodge RAM
Engine: 305 TPI / Hemi 5.7L
Transmission: 5 speed / 4x4 auto
Re: No tach or speedo
Here is some reading and a diagram from a 92 that should be pretty darn close to if not exact to your setup.
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