1972 85HP Chrysler Spark Test

[turtle1173]

Hi all,<br /><br /> I'm helping a friend of mine with his "new" motor. The model # is: 857HD<br /><br /> It has no spark and I want to test to see if it is a distributor problem or the CD module. My problem is that I don't have a wiring harness and ignition switch yet. The test I'm familiar with involves putting a spark tester in the coil, grounding it, and then grounding the wire on the distributor. I believe this test calls for the key switch to be turned "on."<br /><br /> Is there any way to do a test without having a wiring harness and key switch?<br /><br />Thanks,<br /><br />Shane

 

[12Footer]

Re: 1972 85HP Chrysler Spark Test

Yes. Hook up a battery to the starter soleniod, jump it with the screwdriver or temp switch, and check it. You can also check for spark by spraying a little mixed fuel into the carbs, and trying it. It should run while fuel is present.<br /><br />The only way to stop it is running out of fuel (not healthy BTW), or by grounding the spark, or by grounding the white , (or black with yellow stripe on later models) wire on the terminal strip to frame ground anywhere.

 

[steelespike]

Re: 1972 85HP Chrysler Spark Test

Your motor probably uses a capacitor discharge ignition.Similar to that used on some older cars.It must be tested only with the proper procedures or you can damage the system.Get yourself a manual and follow it carefully.You may find one at the library.

 

[turtle1173]

Re: 1972 85HP Chrysler Spark Test

I found out, from a mechanic friend of mine, that if you connect the red and blue wires together on the terminal, is simulates turning the ignition key to the "on" position.<br /><br />This is pretty useful information because I didn't have a wiring harness & key switch yet.<br /><br />Shane