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Check the plug in the back. It may have come loose.
Any other issues pop up at the same time?
 

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My K4 750 came that way, and it was due to the previous owner "installing" "HID's" that burned the main ground on the harness that runs to the front of the bike and to the gauge cluster. Killed the headlights, blinkers up front, and cluster.

I had to take the front harness off the front of the bike, clean out all the plugs and polish off the burned char off the burned ground contact, replace the burned wires, resolder on the connectors as they were intended to be, continuity check all the wires for cross-shorting, and then I actually moved the big ground in that main front harness plug to another unused slot, since the housing where that big ground wire crimp clipped in had burned, I moved it on both the front harness and the main engine harness where it plugs into to ensure better contact. Then I re-wrapped the harness in new protective wrapping, and shaped it back to the stock shape so the harness would reach everything.

Fixed, everything works as it should. If you want pictures or more info, I detailed this in my K4 750 restore thread in that area if you want an idea of what that look(ed) like.

-Mike
 

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Discussion Starter · #5 ·
My K4 750 came that way, and it was due to the previous owner "installing" "HID's" that burned the main ground on the harness that runs to the front of the bike and to the gauge cluster. Killed the headlights, blinkers up front, and cluster.



I had to take the front harness off the front of the bike, clean out all the plugs and polish off the burned char off the burned ground contact, replace the burned wires, resolder on the connectors as they were intended to be, continuity check all the wires for cross-shorting, and then I actually moved the big ground in that main front harness plug to another unused slot, since the housing where that big ground wire crimp clipped in had burned, I moved it on both the front harness and the main engine harness where it plugs into to ensure better contact. Then I re-wrapped the harness in new protective wrapping, and shaped it back to the stock shape so the harness would reach everything.



Fixed, everything works as it should. If you want pictures or more info, I detailed this in my K4 750 restore thread in that area if you want an idea of what that look(ed) like.



-Mike

Thanks Mike. The indicators are working fine and the headlight bulbs are standard. I'm totally lost with it.
 

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Hmm. Well that's a good sign that the whole thing isn't messed up. Either way though, you probably need to pull the whole front off the bike and get that front harness out. Get a digital multimeter if you don't have one, and visually check the plugs.

If you get in there and look at the insides of the plugs and the wires and don't visually see something obviously wrong, then the meter will help you see if the problem is the harness, the cluster, or your main harness.

But a lot of the time, wiring issues are plainly visible if you're looking in the right place. Just gotta know exactly where to look!

Hope this helps. Let us know if you find anything pulling the front off the bike, shouldn't be too involved.

-Mike
 

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Discussion Starter · #7 ·
Hmm. Well that's a good sign that the whole thing isn't messed up. Either way though, you probably need to pull the whole front off the bike and get that front harness out. Get a digital multimeter if you don't have one, and visually check the plugs.















If you get in there and look at the insides of the plugs and the wires and don't visually see something obviously wrong, then the meter will help you see if the problem is the harness, the cluster, or your main harness.















But a lot of the time, wiring issues are plainly visible if you're looking in the right place. Just gotta know exactly where to look!















Hope this helps. Let us know if you find anything pulling the front off the bike, shouldn't be too involved.

Thanks













-Mike

Thanks Mike. I will start to remove front end tomorrow. Top bloke thank you. 😊 I will let you know
 

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Tach stuck at 6000 is not a good sign. Do the digital readouts work? You could try removing the cluster's circuit board from its outer case and look for corrosion. Someone like Blue Gauges might be able to fix it - if it's more than bad connections to the cluster connector.
 
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