Hello Everyone, I have a 1989 Range Rover. I am getting no spark from the coil. I have gone through all the tests in the service manual and the book tells me it is either the coil or the plug wires, both of which have been replaced. I have tested the ignition load relay on its own and it closes with 12 volts. The strange thing is that when I test the relay socket I get less than 0.5 volts through the two contacts that are supposed to activate the relay, no matter what position the ignition switch is in. Does anyone know the correct voltage needed to activate this relay or is there an inline fuse I am not finding. If I am on the wrong track and the problem lies elsewhere please help. The electrical diagrams in the service manual I have are not correct, so I am kind of in the dark. Here is a link to the manual I am using,
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. Before this problem the engine was overheating due to a bad radiator, so I replaced the radiator. Then the water pump went out. I replaced the pump and the thermostat. All seemed well and after 2 days of normal driving with no problems it quit on the highway at 60 mph as if I had just turned off the ignition. I pulled over and it would not start. After 10 minutes checking connections and finding nothing wrong it started. I parked it when I arrived at work at 7am & restarted it at 11am & 3pm with no problems. Then at 4pm when I was to leave for the day it would not start and has not turned over since. I thought it may be the coil, amplifier, alternator, wires, relays or fuses. But like I stated above I have tested and ruled them out using the service manual. I have no way of testing the ignition switch out of the vehicle or checking voltages in the wiring since I do not have an accurate electrical diagram. Any help would be greatly appreciated.
Thanks, Michael