I have a 1942 Dodge truck that has no spark to the plugs. The coil has a wire coing to the distributer and on the back of the coil there is a cable going to the ingnation switch. Is it the coil?
It could be, but anybody with a multimeter could quickly test it, give you a good idea if it is good or not. Just take the two wires off-the wire going to the distributor would be the negative side, and the wire from ignition switch is the positive side. There should be a + sign, and a - sign on each side of the coil case where the wires connect. Then remove the coil to distributor high tension cable, remove the coil from it's bracket and take it to a friend or shop to have tested. All they would do is measure the resistance of the coil at two places, using an ohmmeter (part of a multimeter), to see if it is within specs. A shop charge should be like $5, if they would even bother to charge you.
What else might it be? Well, one could check if power is passing from the switch to the coil on that wire. The wire on the coil should show battery voltage, or very close, when key is turned to on. Also examine your plug wires for brittleness or cracking. If no spark at any plug, it could be a bad coil to distributor high tension lead-the one from coil tower to center of distributor cap.
Also pertinent to note that the mechanical points and condensor assembly inside the distributor has to be working right for spark to occur. This is what the small wire from coil to distributor connects to- the points. Someone knowledgeable about how it works would need to look at it-the points have two small electrical plates or contacts that open and close as the distributor shaft turns around. This opening and closing is what makes the coil able to generate the high voltage for spark to occur at the plugs. Higher voltage travels from the coil tower to the top of distributor, and on to the individual spark plug wires, routed to each in turn in the firing order by a simple device called a rotor.
Take off the distributor cap, and right on the top of the distributor shaft is the rotor. It has to be in good working order to transfer current from the coil high tension wire to the individual spark plug wires.
Post back. Keep me informed of your progress. You must have the old 6 volt system? Amazing! Buy new plugs, plug wires, points and condensor for it. And a coil, if you need to-good luck. Parts may be hard to find. First check locally, may need to go online for a vintage parts supplier.
Mar 14, 2013 |
1985 Dodge Ramcharger