Find tach wire or rewire it, 89 rs with v8 gagues.
12-07-2016, 07:06 PM
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Find tach wire or rewire it, 89 rs with v8 gagues.
Hello everyone, i'm trying to find out what the tach wire for my car is, it's an 89 rs but has v8 gagues(swapped to a 355 carbed) i keep seeing everyone say it's white but i'm not really seeing any loose white wire.
The only wire that's loose with a distributor connector is a green wire, maybe because they're v8 gagues the wire is green?
If not is there a picture anyone has of the specific place where my tach wire would start(wires are all bundled from previous owner) where i can expose some of the wire and check if it's actually a tach wire.
If not is there anyway i can rewire the tach signal wire? If so how?
Thank you
The only wire that's loose with a distributor connector is a green wire, maybe because they're v8 gagues the wire is green?
If not is there a picture anyone has of the specific place where my tach wire would start(wires are all bundled from previous owner) where i can expose some of the wire and check if it's actually a tach wire.
If not is there anyway i can rewire the tach signal wire? If so how?
Thank you
12-07-2016, 08:19 PM
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Find tach wire or rewire it, 89 rs with v8 gagues.
With my '89 Firebird it was a WHITE wire from Terminal D6 of the C100 connector on the firewall.
12-07-2016, 09:47 PM
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Re: Find tach wire or rewire it, 89 rs with v8 gagues.
i looked up pictures of the c100 connector, it looks totally different than my connectors
i did however see a white wire come from a connector on the fire wall.
could this be it? and if it is seeing my gauge appears to be swapped(all gauges except for tach and oil pressure(if it is this white wire it's currently not hooked up to the msd or coil) would hooking it up make the tach work if functional? also the tach lights up and i've seen it on a few occasions move barely.
i did however see a white wire come from a connector on the fire wall.
could this be it? and if it is seeing my gauge appears to be swapped(all gauges except for tach and oil pressure(if it is this white wire it's currently not hooked up to the msd or coil) would hooking it up make the tach work if functional? also the tach lights up and i've seen it on a few occasions move barely.
12-07-2016, 10:10 PM
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Find tach wire or rewire it, 89 rs with v8 gagues.
Talk about a useless photo. It is the size of nano technology.
12-07-2016, 10:16 PM
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Re: Find tach wire or rewire it, 89 rs with v8 gagues.
I resized it like a dunce thinking it would be too big.
Round two, still nope
ffs just going to have to click the link to the original pic
https://s28.postimg.org/4dar9ig0d/KIMG0163.jpg
Round two, still nope
ffs just going to have to click the link to the original pic
https://s28.postimg.org/4dar9ig0d/KIMG0163.jpg
12-09-2016, 11:36 AM
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12-09-2016, 09:09 PM
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Re: Find tach wire or rewire it, 89 rs with v8 gagues.
yea it's making me feel like i should just say f it and splice the white wire that i think it might be lmao
but on the other hand the v8 gauge saying it has a black also is making me apprehensive because now i'm not sure if the tach is grounded or not.
but on the other hand the v8 gauge saying it has a black also is making me apprehensive because now i'm not sure if the tach is grounded or not.
12-09-2016, 11:50 PM
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Car: 88 convertible
Engine: 5.7L
Transmission: 4+3 maual
Axle/Gears: 3.07
Re: Find tach wire or rewire it, 89 rs with v8 gagues.
According to the diagrams at Austinthirdgen, it is a white wire and goes through the firewall at the C100 connector at terminal D6 (as stated above by Qwk trip).
12-10-2016, 07:27 AM
#10
Re: Find tach wire or rewire it, 89 rs with v8 gagues.
Pretty sure that the only WHITE wire in the C100 connector is the TACH wire,....
Pull the cluster, then use a voltmeter to probe the WHITE tachometer wire terminal on the 'C1 plug'. Once the voltmeter is in place, use a "jumper" wire to apply 12 volts to the white wire in your engine bay and see if the white wire @ the cluster plug has voltage. If it's got voltage,.... you've found your TACH wire !
Pull the cluster, then use a voltmeter to probe the WHITE tachometer wire terminal on the 'C1 plug'. Once the voltmeter is in place, use a "jumper" wire to apply 12 volts to the white wire in your engine bay and see if the white wire @ the cluster plug has voltage. If it's got voltage,.... you've found your TACH wire !
12-10-2016, 05:18 PM
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Re: Find tach wire or rewire it, 89 rs with v8 gagues.
i figured it would be easy to just put a new tach in but i really like the look of the camaro gauges so it would have been a waste to just leave the stock tach dead.
12-10-2016, 06:33 PM
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Find tach wire or rewire it, 89 rs with v8 gagues.
Pull the cluster, then use a voltmeter to probe the WHITE tachometer wire terminal on the 'C1 plug'. Once the voltmeter is in place, use a "jumper" wire to apply 12 volts to the white wire in your engine bay and see if the white wire @ the cluster plug has voltage. If it's got voltage,.... you've found your TACH wire !
12-10-2016, 09:11 PM
#14
Re: Find tach wire or rewire it, 89 rs with v8 gagues.
Oh, hell no! NEVER apply power to a wire that you don't know what it is.
Pretty sure that the only WHITE wire in the C100 connector is the TACH wire,....
It's the ONLY White wire @ C100 and it's the ONLY white wire in either of the cluster plugs (I included both plug diagrams for the cluster to show this......) Not a whole-lotta' risk involved here.