News:

This forum is run by RPM and donations from members.

It is the donations of the members that help offset the operating cost of the forum. The secondary benefit of being a contributing member is the ability to save big during RPM Holiday sales. For more information please check out this link: Membership has its privileges 

Thank you for your support of the all mighty FJ.

Main Menu

FJ1100 won't run in neutral with sidestand down

Started by Gearbox Paul, February 25, 2026, 10:14:54 PM

Previous topic - Next topic

Billy Bananahead

From what i remember there is a diode in the wiring loom. It's hard to locate without actually cutting open the loom casing. It's somewhere between the headstock and fuses. Sorry i can't be more helpful. I'll see if i can find the one i replaced and post a picture.

Billy Bananahead

I'm sorry but i've lost the diode that i took out of the FJ loom but here's some info and the diode universal symbol > https://www.pcbasic.com/blog/diode_symbol.html
If you look in the Haynes Book of Lies at the wiring diagram then the symbol is there in the loom, just look for the symbol, but that is only on 1986 and 87 models. That's why i call it the Haynes Book of Lies as it could have been omitted regarding later models.
But looking at the wiring diagram could you bike have a problem with the side stand relay or is that earlier models only?

Pat Conlon

The most common issue with the side stand switch is the switch itself....a simple continuity test on the switch leg will identify any side stand switch problem.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

JTNWEvo

Thanks for the responses guys. I did test the side stand switch with a multi-meter and it appears to be functioning correctly.  I currently have the switch bypassed but would prefer if everything was fully functional. 

Sparky84

Quote from: JTNWEvo on March 24, 2026, 12:34:35 PMThanks for the responses guys. I did test the side stand switch with a multi-meter and it appears to be functioning correctly.  I currently have the switch bypassed but would prefer if everything was fully functional. 
If the side stand switch is functioning correctly how are bypassing it ?

If you are just "shorting" it out, then the problem could lie between the "bypass"(shorting) and the switch.
The switch goes to earth , have you checked that to be ok.
1984 FJ1100
1979 Kawasaki Z1300
1972 Honda CB750/4 K2

JTNWEvo

I test the side stand switch with a multi-meter on the plug. When the stand is up the circuit is complete and when it is down the circuit is open.  I have a jumper wire on the harness side of the bike completing the circuit now to bypass the switch. The problem is the bike wont run with the side stand down when in neutral unless I am holding in the clutch. The neutral light is on.

Is there some other test I should do?

Thanks!