Speedo Tach Reverse lights not working
Thread Starter
Member
Joined: Sep 2009
Posts: 118
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From: Long Island NY
Car: 92 Camaro RS
Engine: 77' 350 bored 355 Holley carb
Transmission: Turbo 350
Speedo Tach Reverse lights not working
i bought 92 camaro rs december from a guy that put a 77 350 BM shift kit turbo 350 trans in. The speedo, tach and back up light do not work. He had reverse lights hooked up to toggle. They work like that but its stupid and lazy on his part. Any suggestions how to fix all this. Isnt the trans mechanical and the speedo digital. also i have an aftermarket tach but want everythine in dash to work. thanks.
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
Speedometer Still On Zero - Keep It Floored !
The backup light switch is (unless the PO removed it) mounted on the right side of the shifter.
The colors responsible for the backup lights are dark blue, and light green.
Because the speedo and tach don’t work find out if there’s power going to them.
If the needles move at all when you turn the key to RUN there probably is power.
Is there power to them?
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Happy Racing!
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I Don’t Mind Wreckin’ On The Track, No Paperwork To Fill Out
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The colors responsible for the backup lights are dark blue, and light green.
Because the speedo and tach don’t work find out if there’s power going to them.
If the needles move at all when you turn the key to RUN there probably is power.
Is there power to them?
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
I Don’t Mind Wreckin’ On The Track, No Paperwork To Fill Out
.
Last edited by NINÅ; Jul 5, 2010 at 02:46 PM.
Thread Starter
Member
Joined: Sep 2009
Posts: 118
Likes: 0
From: Long Island NY
Car: 92 Camaro RS
Engine: 77' 350 bored 355 Holley carb
Transmission: Turbo 350
Re: Speedometer Still On Zero - Keep It Floored !
no switch near shifter just loose wires. where can i get the switch. the needle to the speedo never moves. the tach has moved once or twice.
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
Speedometer Still On Zero - Keep It Floored !
where can i get the switch.
ACDelco P/N D2234.
However it takes a connector and you said there are loose wires there.
You can try to get a connector, or if you’re good with a soldering iron you can do it that way.
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For the tach see if the WHITE WIRE from the firewall is connecting to the distributor.
Because you’ve got a 77 distributor the terminal is usually above the vacuum advance connector.
If that looks OK make sure the signal gets to pin 7 WHITE WIRE on the dash connector located on the right side connector.
You can use a test light (the type for testing for voltage, not a continuity tester) to probe for tach signal.
Then make sure the black wire with a WHITE STRIPE goes to ground.
If those parameters are met your problem is in the dash.
It could be a cracked circuit trace or the electronics could be defective.
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For the speedometer probe the output of the VSS with an audio amplifier to make sure it’s putting out a signal.
Connect the amp’s input to the output of the VSS as you would a CD player.
Ground to ground, the signal wire to the inner wire of the audio amplifier wire.
When driving, or simulating VIA having the car on a dyno, you will hear a hum which increases in pitch when the wheels are turning faster, if the VSS is good.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
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