Author Topic: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)  (Read 67864 times)

Offline volador

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #500 on: May 14, 2020, 06:17:49 PM »
'Pin #85 of FI relay should see -12v: It reads nothing. However when red lead is on battery positive and black to pin #85 it reads 12v when the start button is depressed.'

'correct ground test' is verified- you have established ICU Pin7 is providing ground for Pin85 when starter button is depressed

Pin #30 of FI relay should see +12v at any time even with ignition off: It reads nothing.

you need to check wire to FI relay Pin30 as you said should see +12V  -maybe sparky sparky no likey

you can jumper Starter relay Pin30  to FI relay Pin30 for +12V for test starting
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Offline DJEwen

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #501 on: May 31, 2020, 06:17:41 AM »
'Pin #85 of FI relay should see -12v: It reads nothing. However when red lead is on battery positive and black to pin #85 it reads 12v when the start button is depressed.'

'correct ground test' is verified- you have established ICU Pin7 is providing ground for Pin85 when starter button is depressed

Pin #30 of FI relay should see +12v at any time even with ignition off: It reads nothing.

you need to check wire to FI relay Pin30 as you said should see +12V  -maybe sparky sparky no likey

you can jumper Starter relay Pin30  to FI relay Pin30 for +12V for test starting

Ok- I checked the connections in the fuel injection relay socket and all seems well, no issues. The replacement relay arrived and I installed it but I still have no fuel pump. Itís also fantastic weather outside :(
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Offline Laitch

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #502 on: May 31, 2020, 08:09:26 AM »
Have you removed the fuel pump and checked it for operation on the bench. The battery problem and the fuel pump problem could be coincidental.
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Offline DJEwen

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #503 on: May 31, 2020, 08:46:58 AM »
Have you removed the fuel pump and checked it for operation on the bench. The battery problem and the fuel pump problem could be coincidental.

I have, Laitch. Itís working fine.

Iíve had some mice recently, caught a load. Iím wondering if maybe something has been chewed.
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Offline Laitch

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #504 on: May 31, 2020, 08:51:55 AM »
Is there continuity at your recently cleaned four-pin plug and at the connection between the fuel gauge and the pump?
  • Along the Ridley in Vermont.
  • 1995 K75 77,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline DJEwen

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #505 on: June 01, 2020, 08:43:00 AM »
Is there continuity at your recently cleaned four-pin plug and at the connection between the fuel gauge and the pump?

There is continuity at the four pin. Are you suggesting testing for continuity inside the tank from the 4 pin to the pump? I hadn't done that.
I remember back at Post #239 on page 10 then RBMs reply at #242 he suggests dodgy internals of the old type senders but he may be referring to the thermistors to the fuel level gauge.
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Offline Laitch

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Re: "Revive" (1985 K100 Street Scrambler Build, not a Cafe Racer)
« Reply #506 on: June 01, 2020, 11:32:34 AM »
There is continuity at the four pin. Are you suggesting testing for continuity inside the tank from the 4 pin to the pump?
That's what I'm suggesting.  icon_cheers
  • Along the Ridley in Vermont.
  • 1995 K75 77,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider