 914 Tachometer not working |
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| vin man |
 Feb 7 2017, 03:20 PM
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#1
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Member  Group: Members Posts: 178 Joined: 19-February 10 From: Gilbert, Arizona USA Member No.: 11,380 Region Association: Southwest Region  |
I've done some searching and have not yet found a thread that I'm sure has been covered at some point.
The tach in my 72 does not work. The car was converted from fuel injection to carbs long ago. I believe the reason the tach does not work is because it is no longer getting a signal from the computer (no longer have an ECU in the car). How does one use the factory tach when I no longer have FI? In other car projects, I just ran a line from negative side of the coil to the back of the tach. But I don't think that will work here, will it? |
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| timothy_nd28 |
Feb 7 2017, 10:24 PM
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest 
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The black/purple stripe wire should enter on the 14 pin connector at pin 7. It continues thru the relay board and exits pin 5 of the 12 pin connector.
You should check the 12 pin connector on the relay board, if you take a peek you will see a black/purple stripe wire. Follow it, see where it goes.  |
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| vin man |
Feb 8 2017, 09:32 AM
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#3
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Member Group: Members Posts: 178 Joined: 19-February 10 From: Gilbert, Arizona USA Member No.: 11,380 Region Association: Southwest Region |
QUOTE(timothy_nd28 @ Feb 7 2017, 09:24 PM)  The black/purple stripe wire should enter on the 14 pin connector at pin 7. It continues thru the relay board and exits pin 5 of the 12 pin connector. You should check the 12 pin connector on the relay board, if you take a peek you will see a black/purple stripe wire. Follow it, see where it goes. Is the 12 pin the one closer to the firewall? That is the one that I spliced on to and ran to the coil. If not, I will look to see if I find a black/purple wire on the other connector and see where it goes. It definitely wasn't on the coil. |
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Posts in this topic
vin man 914 Tachometer not working Feb 7 2017, 03:20 PM
timothy_nd28 There is already a black with purple stripe wire t... Feb 7 2017, 04:19 PM The Cabinetmaker The djet cars have a large black power wire, a sma... Feb 7 2017, 04:28 PM vin man Thanks. On my way over to test as you suggest. Feb 7 2017, 04:28 PM vin man According the repair manual I have, the wire from ... Feb 7 2017, 07:06 PM The Cabinetmaker Green with red is the oil pressure sender. Feb 7 2017, 07:52 PM vin man That's right. Maybe the wire for the tech was ... Feb 7 2017, 08:02 PM timothy_nd28 I'm just curious, where was the black and purp... Feb 7 2017, 08:39 PM rdauenhauer Tim is there a way to simulate the signals to ... Feb 7 2017, 10:02 PM vin man The black with purple stripe wire came to this plu... Feb 7 2017, 10:09 PM timothy_nd28 20 bucks in Radio Shack parts and a Iphone (or sim... Feb 7 2017, 10:18 PM
timothy_nd28 12 pin connector is not the one by the firewall Feb 8 2017, 10:01 AM vin man
12 pin connector is not the one by the firewall
... Feb 8 2017, 10:15 AM vin man
12 pin connector is not the one by the firewall
... Feb 8 2017, 10:18 AM |
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