dave m Posted July 18, 2020 Share Posted July 18, 2020 hi a. now s you may have read i did get my fuel and new volt gauge working,,now in the pross my tach stoped working. I know i have power to the cluster because everything else it feds works. i am going to make sure i have rpm read from to the plug... next i want to jump from the tach wire lead to the back of the gauge, can anyone tell me which terminal on the back of the fauge i would run a jumper to. note when i first crank the car the tach jumps up to 1000 rpm for a split second also it is a new circuit board (IT IS A MATCH FOR THE OLD ONE) also am running msd box so the tach wire comes out of that,, I think the tach worked when i first tested the other gauges thanks dave Quote Link to comment Share on other sites More sharing options...
1970mcss Posted July 18, 2020 Share Posted July 18, 2020 I'm not sure about the mad box but I have an issue when my car sits out in the sun or the interior gets hot the tach doesn't work. If the car cools down the tach works fine. Good luck Quote Link to comment Share on other sites More sharing options...
Leghome Posted July 18, 2020 Share Posted July 18, 2020 I have an MSD box and my tach runs off of the distributor Quote Link to comment Share on other sites More sharing options...
dave m Posted July 18, 2020 Author Share Posted July 18, 2020 thanks the car is in the garage its hot but not like out in the sun...... when i dd the msd the instructions told me to use the wire term on the left side of the box looking at it i also am running a hei style dist mybe that why i am going to try to check thing tomorrow, it is supposed to be 97 so if i can stay cool enough with the fans i,ll give it a shot Quote Link to comment Share on other sites More sharing options...
1970mcss Posted July 18, 2020 Share Posted July 18, 2020 There should be a terminal from the HEI distributor for the tach lead. Quote Link to comment Share on other sites More sharing options...
dave m Posted July 21, 2020 Author Share Posted July 21, 2020 hi my msd connects to the tach term and the power term.per their directions. i did try to hook the tach to that spot were it belongs with no luck.. i am going to try and runa jumper from the tach wire on my truck to the tachlead on the monte just to see if the tach in the dash is working or i have another prob. if the tach does work then i guess i have to switch back to stock hei without the msd until i can afford a new one...... anybody got one for sale affordable it can be an old 6-a as long as it works Quote Link to comment Share on other sites More sharing options...
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