TFI Ignition Coil
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From: Northeast Oklahoma
TFI Ignition Coil
Hey guys, so I was installing my tach I just bought for my 89 F250 last night, got to the part where I needed to hook up the ignition wire that actually reads the RPM of the motor, problem is I have to hook it too the negative(-) side of the coil, my coil, that I can see anyway isnt marked, it may be on the side facing the firewall but I cant see that. What I was wondering is which wire on the factory plug is the negative(-) wire? I have a white wire at the top in the plug and (2) green wires at the bottom of the plug, which one of these wires is the negative(-)? I didnt have any problems at all hooking it up on my 86, the coil was clearly marked on it, this one I am having some difficulty. I appreciate the help.
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