Here's an odd wiring issue......any thoughts?


Information and questions on GL1000 Goldwings (1975-1979)
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warfare
Posts: 1
Joined: Sun Mar 04, 2018 8:39 pm
Location: vancouver
Motorcycle: 1978 gl1000

Here's an odd wiring issue......any thoughts?

Post by warfare »



Hi Guys, new to the community. Trying to restore an old 78 gl1000 I inherited when my Dad passed away. Has been sitting since 91. Done allot of work on it to get it road worthy and am on the last stretch......so I thought.

Here's the deal. It has:
- original Dyna III ignition
- replacement wiring harness (chased for shorts)
- Vetter Fairing (wiring double checked and spliced in)
- rebuilt turn signal switch/cleaned up

The issue is,

When you turn the right flasher on, the bike shuts off. As if the cut off switch has been used.

This only happens with the right signal. When the left is activated or when in the neutral position the bike runs fine. Regardless of it running or not all flashers, headlight, tailight work good.

Also, weird, when you pull the fuse for the tailight it shuts off as well!!!

I really appreciate your insight into these old bikes.

Any thoughts?

Patty


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virgilmobile
Posts: 9088
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Here's an odd wiring issue......any thoughts?

Post by virgilmobile »

This sounds like the power wire for the ignition is tied into the lamp circuit (which is hot with the key on)rather than straight to switched ignition from the ignition switch.
That funny lighting module is involved in this circuit.
DaveO430
Posts: 1201
Joined: Fri Jan 02, 2015 7:28 pm
Location: Amity. Ar
Motorcycle: 2010 GL1800
2004 Suzuki DR200

Re: Here's an odd wiring issue......any thoughts?

Post by DaveO430 »

I think the ignition is tied in to the right front position light circuit.
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DenverWinger
Posts: 1711
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Here's an odd wiring issue......any thoughts?

Post by DenverWinger »

Without looking at any wiring diagrams any thought that the ignition may have lost a ground connection somewhere and is finding some ground via the hot side of the right turn bulb filaments, which would be OK if the right turn signal was off. Ignition Current through the bulbs would probably not be enough to light the bulbs. But that ground route wouldn't be viable anymore when you put 12v from the flasher to the filaments...

You could test this by pulling the right side turn signal bulbs with the engine idling. If it dies.......
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
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jeffcosmo
Posts: 228
Joined: Thu Aug 22, 2013 9:26 pm
Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Here's an odd wiring issue......any thoughts?

Post by jeffcosmo »

I agree. Weird electrical problems are usually traceable to bad grounds. And light bulbs have been used for grounds, so it is definitely a feasible issue.

Cosmo
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Fred Camper
Posts: 1339
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Here's an odd wiring issue......any thoughts?

Post by Fred Camper »

certainly consider an issue with the reserve lighting unit. They have been responsible for quite a few issues.


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