Author Topic: 12..8 volts at batt-dead at ignition switch  (Read 331 times)

Offline 85killzillaRS

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12..8 volts at batt-dead at ignition switch
« on: February 02, 2021, 03:16:31 AM »
i've got a good new battery, 12.8 volts reading at terminals. I don't get anything when i'm hooked up, no lights, horn. Does this sound familiar. It has started and ran well a few months back.
  • El Paso, TX
  • 85K100RS
Christopher
past- 68 BenelliDynamo, 74 HodakaAce100, 76 BultacoMatador250,
85 HondaNighthawk650, 83 HondaCB1100F, 90 KawasakiZX10
Someday ϒll get a bike from this century (no hurry)

Offline Scott_

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Re: 12..8 volts at batt-dead at ignition switch
« Reply #1 on: February 02, 2021, 05:25:05 AM »
First thing I'd check is the ground cable connection at the engine.
Get your voltmeter out and start taking voltage readings across cables.
LSR will affect power to the headlight, but not the ignition switch. The ignition switch is powered straight off the battery.
There are multiple cables(3) that connect at the + of the battery, make sure you got them all connected. (1 to starter relay/fuses/ign switch, 1 to LSR, 1 to alternator) They may or may not connect in 1 crimp connector, if it is showing signs of corrosion, it could be going bad.
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1997 K1100LT 0302488 (R.I.P.)
1995 K1100LT 0302044
1997 R1100RT ZC62149
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Offline The Mighty Gryphon

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Re: 12..8 volts at batt-dead at ignition switch
« Reply #2 on: February 02, 2021, 08:34:35 AM »
If the wiring is good, the next thing to look at is the ignition switch.  They are getting to the point in their life cycle where the contacts and other internal parts suffer from problems with dirt and oxidation.  Even if it isn't the current problem, chances are it will be in the future.  A little TLC now will get you some good Karma in the future.

http://www.eilenberger.net/K75S/IgnitionSwitch/
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Offline 85killzillaRS

  • BumbleBrick
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Re: 12..8 volts at batt-dead at ignition switch
« Reply #3 on: February 02, 2021, 03:47:37 PM »
I do have three wires on + terminal. 1 to alternator, the other 2 connect at starter relay. Batt ground is bolted to trans.
  • El Paso, TX
  • 85K100RS
Christopher
past- 68 BenelliDynamo, 74 HodakaAce100, 76 BultacoMatador250,
85 HondaNighthawk650, 83 HondaCB1100F, 90 KawasakiZX10
Someday ϒll get a bike from this century (no hurry)

Offline Scott_

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Re: 12..8 volts at batt-dead at ignition switch
« Reply #4 on: February 02, 2021, 04:15:55 PM »
As TMG suggested, check the wires at the IGN switch. I've had the RED battery supply wire break about 1/2" from where it enters the switch. Break was caused by flexing of wire due to the rotation of the handlebars.
  • My Garage
1997 K1100LT 0302488 (R.I.P.)
1995 K1100LT 0302044
1997 R1100RT ZC62149
"One who does not ask questions is ashamed to learn" Danish proverb

Offline 85killzillaRS

  • BumbleBrick
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  • Posts: 72
Re: 12..8 volts at batt-dead at ignition switch
« Reply #5 on: February 02, 2021, 04:59:27 PM »
Well I found a loose crimp connector on neg side. There was just enough e-tape at connector to hide wire had pulled out enough to break connection.
Thank You !!! for replies
  • El Paso, TX
  • 85K100RS
Christopher
past- 68 BenelliDynamo, 74 HodakaAce100, 76 BultacoMatador250,
85 HondaNighthawk650, 83 HondaCB1100F, 90 KawasakiZX10
Someday ϒll get a bike from this century (no hurry)

Offline 85killzillaRS

  • BumbleBrick
  • ^ Motobrick Curious
  • Posts: 72
ignition switch
« Reply #6 on: February 04, 2021, 09:41:49 PM »
I got a dry cell mounted in tail, had to increase pos cable gauge to get it to flow at that distance, mounted a nitrous bottle where battery tray was. of course one of the wires separated from the switch, I'll get that soldered up tomorrow and go for a spin
  • El Paso, TX
  • 85K100RS
Christopher
past- 68 BenelliDynamo, 74 HodakaAce100, 76 BultacoMatador250,
85 HondaNighthawk650, 83 HondaCB1100F, 90 KawasakiZX10
Someday ϒll get a bike from this century (no hurry)

Offline 85killzillaRS

  • BumbleBrick
  • ^ Motobrick Curious
  • Posts: 72
ignition switch
« Reply #7 on: February 04, 2021, 09:48:37 PM »
got rid of the black plastic reservoir and mounted a can style reservoir, it's in upper right in pic
  • El Paso, TX
  • 85K100RS
Christopher
past- 68 BenelliDynamo, 74 HodakaAce100, 76 BultacoMatador250,
85 HondaNighthawk650, 83 HondaCB1100F, 90 KawasakiZX10
Someday ϒll get a bike from this century (no hurry)

Offline 85killzillaRS

  • BumbleBrick
  • ^ Motobrick Curious
  • Posts: 72
Re: 12..8 volts at batt-dead at ignition switch
« Reply #8 on: February 05, 2021, 09:58:58 PM »
now that ORIGINAL problem has been fixed
someone was -kind- enough to make that clear to me
i suppose it's time to buy a shirt for the member who made the same remark as me
 Laitch, you may remember; if someone does shoot me an email
  • El Paso, TX
  • 85K100RS
Christopher
past- 68 BenelliDynamo, 74 HodakaAce100, 76 BultacoMatador250,
85 HondaNighthawk650, 83 HondaCB1100F, 90 KawasakiZX10
Someday ϒll get a bike from this century (no hurry)