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Signal Cancel Module repair 5 years 10 months ago #20172

  • scotch
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Thought I'd remove the cancel module and see if I could determine why it hasn't worked for almost as long as I've owned the bike.
I warmed the case and the end-cap released and the potted-circuit-board pulled out cleanly ! Soaked the entire block (epoxy) over night in some lacquer thinner. Next day I started picking. Once the soldered side of the board was cleaned I fluxed the terminals and re-soldered each one. Also soldered the 6 harness block and 2 bullet plug terminal ends. Plugged the unit back into the bike and using my cordless drill (chuck) I spun the front wheel. 24 rotations and the unit turned the signal off. Repeated several times. Unit now works. The circuit-board slides into to the case in a track. Used some hot-glue to secure the board in this track and a bead on the inside perimeter to seal the snap-in case-end.
1980 KZ 1300 sr# KZT30A-009997
Always High - Know Fear !
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Last edit: by scotch.

Signal Cancel Module repair 5 years 10 months ago #20183

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ADA Boy !! Nicely done.
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Signal Cancel Module repair 5 years 10 months ago #20187

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I was a little disappointed in not seeing an obvious bad solder connection. Unlike my last OEM style V/R.

Bad V/R joints !

A close look at the "Cancel" board (with some magnification) showed a few soldered terminals that were "dull" but nothing that was an "ah-ha" moment. I was prepared to dig-out the component side and test each until I found the defective one. Fortunately, re-soldering each connection fixed the issue.
1980 KZ 1300 sr# KZT30A-009997
Always High - Know Fear !
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Last edit: by scotch.

Signal Cancel Module repair 5 years 10 months ago #20188

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Nice work!
Hello from Canada's We(s)t coast.
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Signal Cancel Module repair 5 years 10 months ago #20190

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I don't know what the failure rate is for the auto-cancel module. There's plenty for sale on eBay ! There-in lay the concern for myself. I couldn't rationalize buying a "used" one only to discover it wouldn't work. Even if the seller accepted the return, I'd still be out the return shipping and be back to square one. A repair attempt seemed logical.
Todays S.M.T. technology could likely reduce the size of the module to 1/4 the size of the OEM controller; the greatest limitation to size reduction would be the need for a circuit board big enough to establish connections for the 8 wires. It was interesting to see so many components incorporated into the original design.
1980 KZ 1300 sr# KZT30A-009997
Always High - Know Fear !

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Signal Cancel Module repair 5 years 10 months ago #20195

  • StanG
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Congrats scotch on your success!

In the last photo the top connection looks loose, and I'm making out the other two were not solid as well. I think these were actually your smoking gun.

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Last edit: by StanG.
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