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Author Topic: Crazy electrical problem
Jim Feniello Verified Driver
Member

Region: North East - Steel Cities
Car #: 75
Year : 1993
Posts: 44
Status: Offline
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So i could have something really screwed up, but i thought i'd ask first in case the symptoms point to something known and common.

If i hit my turn signals, both turn signals blink (dimly), the tach drops from idle to 0 in sync with the turn signal blinking, and the headlights pop up (they stay up, don't open and close with the turn signals, luckily)(oh, it's a 93).
Any thoughts on where i should start troubleshooting?

thanks,
-jim

springfielddyno Verified Driver
Runoffs "MOVE OF THE RACE" (headlights)

Region: Ozark Mountain Region
Car #: 37, 31
Year : 96, 93
Posts: 775
Status: Offline
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sounds like a short to ground... when the voltage drops too low, the coils don't fire..

just a guess, but we had something similar when a reverse light shorted out...

sam

--------------------
Regards,
Sam H.
www.springfielddyno.com

Jim Feniello Verified Driver
Member

Region: North East - Steel Cities
Car #: 75
Year : 1993
Posts: 44
Status: Offline
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The engine runs fine. The actual rpm's don't drop, just the tach gauge itself.

cam Verified Driver
Cheap member

Region: southwest
Car #: 14
Year : 90
Posts: 739
Status: Offline
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Are you sure it is a Mazda? Sounds like a MG or Triumph with Lucas Electronic parts.

--------------------
"The problem with Socialism is that you eventually run out of other people's money."
~Prime Minister Margaret Thatcher
"A government big enough to give you everything you want, is strong enough to take everything you have."
~Thomas Jefferson

Keith in WA Verified Driver Made Donation to Website
Pack Fodder

Region: NWR / Oregon
Car #: 88
Year : 95
Posts: 2000
Status: Offline
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Sounds like something shorting in the dash. The wire gauges are tiny under there and that's where all the switches are plus the wires to your gauges.

I know on my 95, the pins powering the instument cluster for the retractor and the tach are close together on one connector. The turn signals are close together on the other connector.

--------------------
Keith Novak
(Will work for tires)

Greg Arsenault Verified Driver
Member

Region: WDC
Car #: 54
Year : 1999
Posts: 53
Status: Offline
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quote:
Originally posted by Jim Feniello:
So i could have something really screwed up, but i thought i'd ask first in case the symptoms point to something known and common.

If i hit my turn signals, both turn signals blink (dimly), the tach drops from idle to 0 in sync with the turn signal blinking, and the headlights pop up (they stay up, don't open and close with the turn signals, luckily)(oh, it's a 93).
Any thoughts on where i should start troubleshooting?

thanks,
-jim

Did it just start to happen or did you have the dash/steering column apart? I had a similar problem on a 99 car when I mistakenly swapped some gang plugs. They actually fit together which I was surprised at.

Jim Feniello Verified Driver
Member

Region: North East - Steel Cities
Car #: 75
Year : 1993
Posts: 44
Status: Offline
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I'm going to look at that. My car was the test/sample/parts car when we ran the 12hr of Nelson last year, and we were looking at wires under there at one point to troubleshoot a brake light issue on the running car. I'm going to check to see if any could have been crossed. Thanks for that tip.

Greg Bush Verified Driver
Thread Killer

Region: NW/OR
Car #: 04
Year : 90
Posts: 1765
Status: Offline
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My money is on the plug at the back of the switches for the hazard lights and headlight motors, or the switch itself.

What do I get if I win?

Keith in WA Verified Driver Made Donation to Website
Pack Fodder

Region: NWR / Oregon
Car #: 88
Year : 95
Posts: 2000
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Everytime I'm reading a wiring diagram with a harness in one hand and cutters in the other, I can't help thinking of end of the movie Abyss...

So cutting the brown wire with the yellow stripe will defuse the bomb, but cutting the orange wire with the white stripe will destroy mankind? Hmmm, does that look more of a faded yellow or a yellowed white? [boggled]

--------------------
Keith Novak
(Will work for tires)

cam Verified Driver
Cheap member

Region: southwest
Car #: 14
Year : 90
Posts: 739
Status: Offline
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My guess is the multi-switch stalk on the steering column. Maybe wires loose, maybe just dirty. My wives car started doing strange things with turn singles and various lights. It turned out that the grease in the multi-switch was dirty and causing a connection (arching). I simply took the switch apart and cleaned it, then reinstalled it. Cost = 0. Dealer estimate was around $600.

--------------------
"The problem with Socialism is that you eventually run out of other people's money."
~Prime Minister Margaret Thatcher
"A government big enough to give you everything you want, is strong enough to take everything you have."
~Thomas Jefferson

Jim Feniello Verified Driver
Member

Region: North East - Steel Cities
Car #: 75
Year : 1993
Posts: 44
Status: Offline
Icon 1 posted  Profile for Jim Feniello   Author's Homepage     Edit/Delete Post  Report this post to a Moderator

quote:
Originally posted by Greg Bush:
My money is on the plug at the back of the switches for the hazard lights and headlight motors, or the switch itself.

What do I get if I win?

You'll win the chiropractor bill after laying on my back twisted through rollbars [Smile] .

I'll post back what i find out. Thanks for the suggestions.

Apex to Apex
Member

Region: NASA Mid-West
Car #: 077
Year : 1995
Posts: 180
Status: Offline
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Have you checked your blinker fluid? (I know. Not helpful. It had to be said though).

--------------------
"Driving is a serious business" - John Milner, 'American Graffiti'

John Mueller Verified Driver Made Donation to Website
Okay, not the slowest anymore...

Region: SoCal
Car #: 13
Year : 1992
Posts: 847
Status: Offline
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quote:
Originally posted by Greg Bush:
My money is on the plug at the back of the switches for the hazard lights and headlight motors, or the switch itself.

+1 I had this same prob and the plug had worked loose.

--------------------
Thanks,
John Mueller
NASA SM National Director
http://www.Weekend-Racer.com
#13 "Tiger Miata" - 2009 SoCal SSM Champion

   

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