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Electrical

Tiny
FOOTBALLGURU1901
  • MEMBER
  • 1998 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • MANUAL
  • 110,000 MILES
There is a weird humming coming from the main plug under the dash. Also temp gauge is bouncing up and down. Interior lights dim or non existent, intermittently. Also it's is beeping with no key in ignition and headlights off.
Sunday, June 26th, 2011 AT 8:43 PM

13 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Any applicable trouble codes. Maybe an ignition switch issue. Maybe the system thinks the key is still in the ignition, when it beeps?
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Sunday, June 26th, 2011 AT 8:47 PM
Tiny
FOOTBALLGURU1901
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I unplugged the ignition and the multi function switch problem still occurring. I am thinking short.
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Sunday, June 26th, 2011 AT 8:51 PM
Tiny
FOOTBALLGURU1901
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No check engine lights either
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Sunday, June 26th, 2011 AT 8:52 PM
Tiny
JDL
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I don't care about the check engine lite, I always check for codes, maybe something pending? It's just a habit, you may need scanner that will show pending codes?

Do you have a dimmer for interior lites? Does it work? As far as interior lites, are you talking about dash or dome lite, everything?
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Sunday, June 26th, 2011 AT 9:08 PM
Tiny
JDL
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The diagram below is for instrument illumination
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Sunday, June 26th, 2011 AT 9:15 PM
Tiny
JDL
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I tried to post more info with the diagram, site wouldn't let me, anyway, use a voltage tester on the fuse/s in diagram, see if voltage goes up and down. If it does, engine running, check the charging system.
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Sunday, June 26th, 2011 AT 9:18 PM
Tiny
FOOTBALLGURU1901
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No pending codes. Won't start at all. Doesnt even attempt to crank. It's all lights interior, headlights. Dimmer switch does work.
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Sunday, June 26th, 2011 AT 9:26 PM
Tiny
JDL
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The first thing you need to do is get it to start. Does the battery have a full charge? You can't do anything without a fully charged battery.

What about your security system?
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Monday, June 27th, 2011 AT 4:29 PM
Tiny
JDL
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The passlock security shouldn't have anything to with your starter motor circuit. The purple wire at the starter solenoid S terminal should be hot with key in the crank position, if it isn't backtrack the circuit for voltage. Possibilities, ignition switch--fuses--relay--clutch switch--wiring circuit--starter itself.

Again, if battery doesn't have a full charge and battery connections all clean and tight, we are just spinning our wheels.
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Monday, June 27th, 2011 AT 4:40 PM
Tiny
FOOTBALLGURU1901
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Battery does have full charge? Stumped, thanks for the help, but on the way to the shop now.
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Monday, June 27th, 2011 AT 5:06 PM
Tiny
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Let us know what they find?
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Monday, June 27th, 2011 AT 5:23 PM
Tiny
FOOTBALLGURU1901
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Will do thanks again
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Monday, June 27th, 2011 AT 9:24 PM
Tiny
JDL
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Your welcome.
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Wednesday, July 6th, 2011 AT 3:34 PM

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