Tachometer amperage
Thread Starter
8th Gear
Joined: Sep 2013
Posts: 8
Likes: 0
Tachometer amperage
I have a '76 350 and the tach has not worked in the 2 yrs that I have owned it. I have pulled the dash to get it out and noticed that one of the strips on the circuit board was bad. I replaced that strip with a wire and plugged the tach back in. As soon as the engine started, two more copper strips went up in smoke. I have a new board ordered but am wondering if I am getting too many amps to the tach. Can any one tell me what the amp reading should be going to the tach? Thanks so much!
Melting Slicks
Joined: Jan 2014
Posts: 2,478
Likes: 254
From: Downers Grove Illinois
I have a '76 350 and the tach has not worked in the 2 yrs that I have owned it. I have pulled the dash to get it out and noticed that one of the strips on the circuit board was bad. I replaced that strip with a wire and plugged the tach back in. As soon as the engine started, two more copper strips went up in smoke. I have a new board ordered but am wondering if I am getting too many amps to the tach. Can any one tell me what the amp reading should be going to the tach? Thanks so much!
Thread Starter
8th Gear
Joined: Sep 2013
Posts: 8
Likes: 0
Tach amps
This is a known issue with the boards and the only way to fix it is to order a replacement board that isn't designed like the original. My board also had a burned trace and after replacing the board the tach works great. A component on the board goes bad and draws too much current.
