Problem with wiring from Relay Board to Coil etc., Wiring Problem from Board to Coil... |
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Problem with wiring from Relay Board to Coil etc., Wiring Problem from Board to Coil... |
91422.7 |
Apr 6 2015, 12:15 PM
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#1
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Newbie Group: Members Posts: 36 Joined: 8-October 14 From: Eugene, Oregon Member No.: 17,991 Region Association: Upper MidWest |
Something isn't adding up! I have a 1970 Porsche 914 which I've upgraded with a 2.0L engine out of a 1975 914 along with the 1975 Ignition Wiring Harness. The engine has had the distributor upgraded to an electronic ignition from the original points setup. The two wires coming from the bottom of the distributor (Red goes to Positive terminal on Coil) and (Black goes to negative on Coil). Reference attached picture or diagram I've drawn of the Engine Relay Board, right rear plug in on board! With key on, I'm getting 2 hot wires from the terminals, (One) is the 4th Pin down on left (Solid Black Wire) and the other is the top right pin (Grey with Red Stripe)! The other wires/pins are not hot! Green/Red, Black/Purple, Green Jumper Wire, 2nd Grey/Red Wire, Large Yellow Wire, Black/Red Wire. From diagrams I've pulled from on line, it appears the following wires should go to the following locations from the Engine Relay Board/plug in above mentioned:
* Black/Red Wire goes to (+) Positive on Coil * Black/Purple Wire (Tach Signal Wire) goes to (-) Negative on Coil * Large Yellow Wire goes to Starter * Small Yellow Wire goes to ? * Green/Red Wire goes to Oil Pressure/Sending Unit next to Distributor * Solid Black Wire goes ? * 2 Grey/Red wires go to sending unit on side of transmission ......My question is why are those two wires hot (Solid Black Wire and the One Grey/Red Stripe Wire)? ......Shouldn't instead the Black/Red Wire should be the hot one going to the Coil? ......OR is the problem I have the wrong Wiring Harness and if thats the case why cain't I just change the pin locations on the plug in on the relay? ...Thanks for any help! Attached image(s) |
91422.7 |
Apr 6 2015, 08:43 PM
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#2
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Newbie Group: Members Posts: 36 Joined: 8-October 14 From: Eugene, Oregon Member No.: 17,991 Region Association: Upper MidWest |
I changed the wiring pins up in the 12 pin plug on the relay board as follows:
* 1 = green/red * 2 = grey/red * 3 = blank * 4 = grey/red * 5 = blk/purple * 6 = yellow * 7 = blk/red * 11/10 = jumper wire green On the Coil: * I have on the Positive terminal N15: Blk/Red (Hot) Red Wire from Distributor (Electronic) * I have on the Negative terminal N1: Black/Purple (Tach) Black wire from Coil .....As soon as I hook the Blk/Red Wire to N15 all terminals (+ and -) post go hot! Why? ...Have I got the Coil wired wrong? Thanks |
worn |
Apr 6 2015, 08:59 PM
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#3
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can't remember Group: Members Posts: 3,373 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
I changed the wiring pins up in the 12 pin plug on the relay board as follows: * 1 = green/red * 2 = grey/red * 3 = blank * 4 = grey/red * 5 = blk/purple * 6 = yellow * 7 = blk/red * 11/10 = jumper wire green On the Coil: * I have on the Positive terminal N15: Blk/Red (Hot) Red Wire from Distributor (Electronic) * I have on the Negative terminal N1: Black/Purple (Tach) Black wire from Coil .....As soon as I hook the Blk/Red Wire to N15 all terminals (+ and -) post go hot! Why? ...Have I got the Coil wired wrong? Thanks What do you mean by all terminals? If i understand correctly the minus lead from the coil will not be minus until either grounded by the points or the electronics. Ime the electronics are harder to sus out unless the engine is running and then they are impossible. But then i am easily confused. Still i might expect the reading of the minus side of the coil primary to vary from 12v to ground, depending on the situation. Forgive me if i have found a grove of wrong tres to bark at. |
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