Question about 1979 Harley Davidson XLH 1000 Sportster

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I have a 1979 xlh sporty took bike apart to paint on re assembly i hooked up coil wires wrong had no spark fixed wires but could i have killed my coil still no spark.

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Ok to test the coil, remove all wires from the small terminals on the ends. Use a digital volt ohm meter and put the function switch in OHMS, R X 1. Touch one meter lead to each of the small terminals. Your meter should read between 2-3 ohms as the '79 model had electronic ignition.

To further test the coil, reconnect the two white wires to one of the small terminals. On the other side, make a jumper wire. Connect the jumper wire to the other small terminal. Put the plug wires into the towers and put a set of spark plugs in the wires lying on the heads with a good ground. Now, turn the switch one. The terminals with the white wires on it should be "Hot". MOMENTARILY, ground the jumper to the engine and take it back loose. When you take the wire loose, you should see a spark at the plugs. If you do, the coil is good and your problem lies elsewhere.

Good Luck
Steve

Posted on Sep 16, 2010

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Oct 23, 2011 | 1979 Harley Davidson XLH 1000 Sportster

2 Answers

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Take the plugs out of the heads, put them back in the wires, and lay the plugs on the heads so that they have a good ground. Turn the ignition on and then turn it back off. When you turn the ignition switch off, you should see a spark. If you do, then something is wrong with the ignition unit. If you do not see a spark, you have a bad coil or a wiring problem. You can also do this test by "hot wiring" the coil. Any tine you put 12 volts to the coil then stop it, you should get a spark.

Good luck
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Apr 14, 2011 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

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Listen I have the wiring diagram for the 1975 . I can not post it on this site. But what I can do is send it to you through your email address . So send it to Ral30044@gmail.com and put 1975 in
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What gap are the plugs supposed to have ?


Depends on which spark plugs you're running and the year model of your Sportster. Please provide this information and I can help you.
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Oct 25, 2010 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

Where does the wires go on the ignition coil Positive Negative?? 1972 Sporster XLH Harley


It makes no difference really but with the spark plug wire towers facing the engine, most of the time the hot wire is on the right side and the wire from the points goes to the left side of the coil.

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If you get the service manual and parts guide for your bike (ebay), it will tell you everything you ever wanted to know about your bike including a wiring diagram.

Aug 23, 2009 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

Honda with no spark


Check the fuses. Next, check for spark but with a new spark plugs. How good is the battery? Try a jump from your car battery. Is the kill switch on? Does the side stand have a kill switch? Is it working properly? Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Be sure you have power coming out of the switch.

Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing. If still no spark, get CDI system and coils checked at the dealers shop.

Please rate this answer. Thanks Dan!

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