tach wiring issue 69 camaro - Team Camaro Tech
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post #1 of 10 (permalink) Old Jun 17th, 10, 04:25 AM Thread Starter
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Peter
 
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tach wiring issue 69 camaro

The previous owner of my car installed a MSD distributor in my car and did not hook up the tach. Which color wire in the harness in the engine compartment is for the tach and am I correct to assume that it will be connected to the negative side of the coil.

Thanks,

Peter
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post #2 of 10 (permalink) Old Jun 17th, 10, 06:06 AM
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Camarodude67
 
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Re: tach wiring issue 69 camaro

Hi Pete,

Most Camaros did not come with a Tach from the factory. Do you have an aftermarket
tach or Original style.

Just run a wire from Tach to Negative side of distributer, 1 for power and 1 for ground.

Jeff

69 Vert Triple Black 4-speed.
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post #3 of 10 (permalink) Old Jun 17th, 10, 06:48 AM
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Dave
 
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Re: tach wiring issue 69 camaro

If its a factory tach it should be a brown wire i believe. if you have an msd box there will be a tach terminal on it. If not it should go to the negative side of the coil. You may need a tach filter if jumps alot. If its an hei style distributor there will be a tach terminal on it.
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post #4 of 10 (permalink) Old Jun 17th, 10, 07:54 AM Thread Starter
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Peter
 
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Re: tach wiring issue 69 camaro

The MSD is a ready to run with no tach wiring. I do have a factory in dash tach so I will hook upthe brown wire to the negative side if the coil. Also, I have a yellow wire with a terminal on it like it goes to the coil, do I need to hook it up? where does it go?

Thanks,

Peter
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post #5 of 10 (permalink) Old Jun 17th, 10, 10:24 AM
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Re: tach wiring issue 69 camaro

Yellow was a full 12V from starter terminal to OE points distributor (hooked to pos side of coil) for full voltage to points during cranking; not used for electronic dist.

Eric
69 'vert project big block/TKO 600 RR
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post #6 of 10 (permalink) Old Jun 17th, 10, 11:06 AM Thread Starter
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Peter
 
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Re: tach wiring issue 69 camaro

Eric,

Thanks for your help. So I will disconnect the yellow wire from the starter so I don't get any voltage through the yellow wire when I crank it over correct?
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post #7 of 10 (permalink) Old Jun 17th, 10, 04:28 PM
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Steiner
 
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Re: tach wiring issue 69 camaro

Correct. Also verify that a good 12V ignition line was run instead of tapping into the cloth covered resistor wire coming off the bulkhead connector. It'll run but not optimally. Usually it is done by making up a new fused wire and plugging it onto the spade connector marked IGN on the fuse block inside the car.

'69 Camaro
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TKO 600-Moser 3.42-Detroit Truetrac
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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
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post #8 of 10 (permalink) Old Jun 18th, 10, 05:31 AM Thread Starter
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Peter
 
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Re: tach wiring issue 69 camaro

Steiner,

The white and orange resistance wire was removed from the bulkhead connector and replaced with a 12 gauge wire and run to the positive side of the coil. Should I fuse this wire with an inline fuse or is it OK how it is?

Two questions: 1.) What amprage inline fuse should I use? 2.) The red wire going into the bulkhead connector has a good connection, should I worry about it? Seems like a pain in the *** to remove and replace with everything the set up you suggested, but easy to add an inline fuse.

Thanks,

Peter
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post #9 of 10 (permalink) Old Jun 18th, 10, 05:46 AM
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Steiner
 
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Re: tach wiring issue 69 camaro

If you actually removed the entire wire from the bulkhead connector and then tapped in there then it is already fused.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
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post #10 of 10 (permalink) Old Jun 22nd, 10, 09:13 AM
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Fred
 
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Re: tach wiring issue 69 camaro

Steiner, I don't think that spade is fused.

One owner 69 Camaro,(yep, bought it new
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