Post by jamestheissen on Jun 6, 2011 4:59:30 GMT -5
Hey everyone...did some 'ruff' wiring on my bobber last week, and i might of fried something. Not getting any spark now. I ran the black wire from the alt to pos (purely by accident)...and by the time i turned off the key, most of the insulation was burned off the wire. I"m wondering what else i might of fried, and how to test it. The coil and rotor checked out good. Anyone know how to check the stator and Pamco ign? thanks. james t
1. Using the lowest scale on the meter, measure the resistance between the primary terminals with the wires removed. Should read from 2.5 to 4.5 Ohms. 2. Using the highest scale on the meter, measure between one of the primary terminals and the center core of the coil. Should be infinite resistance. (open) 3. Measure between one of the primary terminals and one of the plug wire terminals. Should be infinite resistance. (open circuit) 4. Measure between one of the plug wire terminals and the core of the coil. Should be infinite resistance (open circuit) 5. Measure from one plug terminal to the other. Should be 15,000 to 20,000 Ohms
Testing the PAMCO
1. Use a voltmeter and check for battery voltage on each of the red/white wires with the key and kill switch are turned on. 2. The dual output coil has to have both spark plug wires connected to a spark plug at all times. 3. To test for spark, connect one of the spark plug wires to a spark plug that is grounded to the engine.
To test for spark without having to turn the engine over, do this procedure: 1. Remove the PAMCO rotor. 2. Remove the locating pin in the advance rod. 3. Reinstall the rotor, but without the pin. 4. Replace the nut holding the rotor on loosely. This will allow you to spin the rotor to produce a spark without having to turn the engine over. 5. Connect one of the spark plug wires to a spark plug that is grounded to the engine, but not installed in the engine. 6. Make sure that the other spark plug wire is connected to a spark plug in the engine. 7. Turn on the ignition switch and the kill switch. 8. Spin the rotor while looking at the gap in the spark plug for a spark. 9. Turn off the kill switch and the ignition switch.
It's not likely that the stator was damaged by the voltage reversal. What is more likely is that the rectifier / regulator was damaged. Read up in the electrical section on how to test these parts. It's been done before.
Post by jamestheissen on Jun 6, 2011 10:28:18 GMT -5
will do, thanks again Pete. I love your electronic ign...i have a 77 bobber and just sold my 80 cafe racer. both have your ignition, and both run (ran) great, until i started 'simplifing' my bobber wiring!!! thanks for all you do. james
Do you have a Clymer manual. On page 38 is the charging sytem trouble shooting. It tells how to check the regulator and rectifier. Being a 77 it has the selenium rectifier and mechanical regulator. Very old technology. Pamcopete figured out how to replace the old parts with more modern rectifiers and a Chrysler regulator. I have them on my 75 and can't be happier with them. You will find the onfo in the charging sytem section. Leo
75 XS650B with 79 forks and dual disc, braided lines, disc brake on back, Pamco ignition, Pamcopete's reg/rec mods, kill switch relay, home made harness, all LED turn, brake and tail lights, tapered head bearings, bronze bushes in swing arm, soon to get shock and fork upgrades