Author Topic: 79 Trans am Clock  (Read 875 times)

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Offline mattblack84

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79 Trans am Clock
« on: June 02, 2019, 12:25:27 PM »
Hi all !  I recently rebuilt my tach and bought a new clock in my 79 Trans Am.  The problem i'm having is now it only works with the car running any body else run into this?

Offline b_hill_86

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Re: 79 Trans am Clock
« Reply #1 on: June 02, 2019, 02:45:25 PM »
Would have to imagine itís power wire to the clock on the plug on the back of the cluster. Happen to have a wiring diagram? Seems to me on my 77 there is a dedicated wire for the clock on that plug if I remember right.
-Brian-

1977 Trans Am 400 4 speed hardtop

Offline Aus78Formula

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Re: 79 Trans am Clock
« Reply #2 on: June 03, 2019, 06:22:04 AM »
The tacho will only work when car is running...yeah, ok leaving now!

Offline mattblack84

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Re: 79 Trans am Clock
« Reply #3 on: June 03, 2019, 09:44:27 PM »
No the clock will only work when running LOL  There is a separate wire I was seeing if someone else had replaced the clock inside there tach.  If i find it i will post a picture so that if anyone else wants to buy the clock only they won't make the same mistake i did.

Offline b_hill_86

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Re: 79 Trans am Clock
« Reply #4 on: June 05, 2019, 12:46:54 PM »
If you have a diagram youíll be able to figure out what wire is power for the clock on the plug that goes into the cluster. I donít know if itís the same for 77 and 79 so I donít want to tell you the wrong pin location. Iíd start there.
-Brian-

1977 Trans Am 400 4 speed hardtop