Not getting 12v to coil on start ('73 Dodge W200 360La)
Hello good buddies,
Main issue on my dd: not getting 12v to coil when running ign hot lead is attached to ballast
Testing: I have 12.5v at battery, starter cranks beautifully, 12.5v coming out of both leads of ignition switch and firewall, 12.5v on start at ballast when run wire is not connected. When run wire is connected to ballast, start wire=11v.
Back ground: I have a 4 pin ballast, originally a real 5 pin ECU (not points), and an msd ign/coil setup, triggered by the original coil positive wire. In my hast to use the timing light, I redid the wiring (to make it easy to switch between stock and Msd ignition) and left the msd coil connected to the stock system. Inevitably the blaser 2 coil burned out the 5 point ecu and was replaced with a new 4 pin ecu. With stock system in place (stock coil as well), car will only start if I quickly flip the ignition switch from start to run. Hence the msd box, which is tested and good, is not triggered by the old wire for +coil. Tried spare ballast, ecu, and voltage regulator and looked for shorts, but no dice.
Everything runs if I momentarily connect a battery hot lead to +coil in stock system or trigger for msd box.
Hello good buddies,
Main issue on my dd: not getting 12v to coil when running ign hot lead is attached to ballast
Testing: I have 12.5v at battery, starter cranks beautifully, 12.5v coming out of both leads of ignition switch and firewall, 12.5v on start at ballast when run wire is not connected. When run wire is connected to ballast, start wire=11v.
Back ground: I have a 4 pin ballast, originally a real 5 pin ECU (not points), and an msd ign/coil setup, triggered by the original coil positive wire. In my hast to use the timing light, I redid the wiring (to make it easy to switch between stock and Msd ignition) and left the msd coil connected to the stock system. Inevitably the blaser 2 coil burned out the 5 point ecu and was replaced with a new 4 pin ecu. With stock system in place (stock coil as well), car will only start if I quickly flip the ignition switch from start to run. Hence the msd box, which is tested and good, is not triggered by the old wire for +coil. Tried spare ballast, ecu, and voltage regulator and looked for shorts, but no dice.
Everything runs if I momentarily connect a battery hot lead to +coil in stock system or trigger for msd box.