My '73 W200 has no spark, I have replaced about everything in the igintion system. Now I have noticed that with the key off, and the lead alternator wire disconnected it arcs. I have removed all the tape from the wires and havent found any bad wires all the way back to the firewall.
318 no spark
- Thread starter R72Demon
- Start date
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67Dart273
Well-Known Member
Which "lead wire" are you referring to? Disconnecting/ reconnecting either of the two "push on" connectors at the alternator (the field connections) WITH THE KEY in "run" will probably result in a small spark --normal
If you are referring to the big stud connected output wire, this should NO spark under any conditions. IF you touch it to ground, you will have 'big' problems
Have you replaced the distributor? Checked the reluctor gap? Take a voltmeter and connect to the connector coming off the distributor, and crank the engine. With your meter set to read low AC volts, the distributor should generate 1V AC when cranking.
Are you getting "juice" to the ballast? That's the "dark blue" (normally) coming from the key through the bulkhead to the ballast resistor.
If you are referring to the big stud connected output wire, this should NO spark under any conditions. IF you touch it to ground, you will have 'big' problems
Have you replaced the distributor? Checked the reluctor gap? Take a voltmeter and connect to the connector coming off the distributor, and crank the engine. With your meter set to read low AC volts, the distributor should generate 1V AC when cranking.
Are you getting "juice" to the ballast? That's the "dark blue" (normally) coming from the key through the bulkhead to the ballast resistor.
duster731
young gun
Distributor, ballast resister on the firewall, coil
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