My barn find 1978 Iron Head Sportster won't start. Need advice.
#21
#22
Once I again I'll make the point. The bike has no power at all. The kill switch has nothing to do with that. The kill switch will kill the engine, not the electrics. I can't
even get to a point to use the kill switch. And by the way, that's the first thing I checked, and it is set to "run". (Thanks for the suggestion too though).
even get to a point to use the kill switch. And by the way, that's the first thing I checked, and it is set to "run". (Thanks for the suggestion too though).
#23
#24
Well, here's a bit of an update on my plight.I've been going through all electrical connections. Checking their integrity and looseness. One stood out as a clear-cut potential culprit. I replaced it but still nothing. While I was checking and tightening all connections I wrenched on the one big nut on the starter solenoid and broke the solenoid. It basically disintegrated. Now I have to replace the solenoid. I took the solenoid out already. So, here's another question for site members - could that have been the source of my electrical problem all along? The short time I had when the electrical was working (before my no electrical at all problem) wasn't totally successful because every time I tried to press the button starter I could just hear a click but it didn't start at all. Typically is a clicking starter a solenoid problem or a starter problem or something else? Plus, is it wise to just change the solenoid or should I do the whole starter? Remember the bike only has 5500 miles on it but sat for 39 years.
Last edited by kewlthing; 05-28-2019 at 10:42 AM.
#25
Well, here's a bit of an update on my plight.I've been going through all electrical connections. Checking their integrity and looseness. One stood out as a clear-cut potential culprit. I replaced it but still nothing. While I was checking and tightening all connections I wrenched on the one big nut on the starter solenoid and broke the solenoid. It basically disintegrated. Now I have to replace the solenoid. I took the solenoid out already. So, here's another question for site members - could that have been the source of my electrical problem all along? The short time I had when the electrical was working (before my no electrical at all problem) wasn't totally successful because every time I tried to press the button starter I could just hear a click but it didn't start at all. Typically is a clicking starter a solenoid problem or a starter problem or something else? Plus, is it wise to just change the solenoid or should I do the whole starter? Remember the bike only has 5500 miles on it but sat for 39 years.
#26
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#27
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Sorce (05-30-2019)
#28
Not yet. I'm not getting any power to the ignition switch it appears. I touch my light tester to the ignition switch and it doesn't light up. Everything seems to get routed through those small relays (they might be called something else but Im calling them relays) under the seat. For example, a negative wire from the battery gets fastened to one of them. Everything from the negative side of the battery seems to check out so therefore I thought it must be something with the bike not getting power from the positive side. Does that make sense? Is that feasible?
#29
Not yet. I'm not getting any power to the ignition switch it appears. I touch my light tester to the ignition switch and it doesn't light up. Everything seems to get routed through those small relays (they might be called something else but Im calling them relays) under the seat. For example, a negative wire from the battery gets fastened to one of them. Everything from the negative side of the battery seems to check out so therefore I thought it must be something with the bike not getting power from the positive side. Does that make sense? Is that feasible?
There shouldn't be a relay between the battery and the ignition. You need a constant hot there. The only thing between the battery and the key switch should be a fuse. So in short - you need a fused wire going directly from the positive on the battery to the common on the ignition switch - no relay or interruption. There will also be a much heavier gauge cable going to the starter, but that won't have anything to do with whether or not you're getting power to the rest of the bike.I had a 77 Ironhead and I don't recall any relays. In fact I was concerned that the wiring was overly simplistic with not enough fuses. Maybe post pics of the relays?
#30
Proviso - my advice is "in general" information on motorcycles - not yours specifically.
There shouldn't be a relay between the battery and the ignition. You need a constant hot there. The only thing between the battery and the key switch should be a fuse. So in short - you need a fused wire going directly from the positive on the battery to the common on the ignition switch - no relay or interruption. There will also be a much heavier gauge cable going to the starter, but that won't have anything to do with whether or not you're getting power to the rest of the bike.I had a 77 Ironhead and I don't recall any relays. In fact I was concerned that the wiring was overly simplistic with not enough fuses. Maybe post pics of the relays?
There shouldn't be a relay between the battery and the ignition. You need a constant hot there. The only thing between the battery and the key switch should be a fuse. So in short - you need a fused wire going directly from the positive on the battery to the common on the ignition switch - no relay or interruption. There will also be a much heavier gauge cable going to the starter, but that won't have anything to do with whether or not you're getting power to the rest of the bike.I had a 77 Ironhead and I don't recall any relays. In fact I was concerned that the wiring was overly simplistic with not enough fuses. Maybe post pics of the relays?