New owner 2006 ST1300 Crazy first electrical question

prafersno

Joined
Dec 8, 2025
Messages
3
Age
54
Location
Florida
Bike
2006 Honda ST1300ABS
Hello, I aquired a '06 for extremely cheap. It was a LD/Iron Butt Rally bike. So, it has a bunch of extra stuff 'wired in' to the harness. Lots of wiring I'm going to have to redo or remove :)
It cranks and runs on starting fluid but No dash lights, nothing on the dash. No indicator lights on right panel. All lights and signals work, brake lights work. AND the power windshield works.
I have only tested the fuses so far. going to move to relays but I don't think the dash would be dependent on relays.

I know it's early in the diagnosis, but I thought I would throw it out there and see if there are any dectectives that love a challenge. :)

Many more questions to come but I'm very happy to have a forum like this!

Thanks!
Greg
 
I would first check the white 24 pin harness connector under the left cowling followed by the yellow buss above and behind the right hand headlight. Many ST1300 electrical faults are traced to corrosion here (look particularly the green wire ground circuits) or overloaded high resistance circuits leading to green wire terminals contained here. Bikes with additional electrical devices may overload the ground circuit and current seeks alternative low resistance paths to ground, bypassing fuel system devices or leading the ignition circuit directly to ground. Very common with ST1300s and here is one with wiring additions for rally use.
 
Check the white 24 pin connector under the left cowling followed by the yellow buss above and behind the right hand headlight. Many ST1300 electrical faults are traced to corrosion here (particularly the green ground circuits) or overloaded high resistance circuits leading to terminals contained here. Bikes with additional electrical devices may overload the ground circuit and current seeks alternative low resistance paths to ground.
 
I don't think so but I'll be checking that tomorrow morning! I definately couldn' hear anything but I'll put the test light on the fuel pump connector.
motornut said:
Yes, the relays are next. Does the fuel pump run momentarily when the ignition is turned on?
Click to expand...
 
Start with the two ground blocks that dduelin pointed you to. This is a known ground failure point of the ST1300 that manifests itself in a myriad of different symptoms that have confounded many people before these failure points became known. Whether this is really the source of your problem or not this is something that you are well advised to check anyway on an older ST1300 if for no other reason than to make sure that they are in good shape to preclude future strange electrical activity. If this is not the cause of your problem report back and we will be able to point you to the next most likely causes to investigate.
 
My "engine stumbling" problem from September thru mid-November turned out to
NOT be a fuel pump,
NOT an EV (charcoal) canister,
but rather corrosion on the grounds for the ignition coils.
And during the year that I owned that bike, it was only caught in the rain maybe 3 times,
and stored indoors, never parked outside in the rain and never left out overnight.
 
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