2002 Mitsubishi Galant

Tiny
PHATBOI
  • MEMBER
  • 2002 MITSUBISHI GALANT
Electrical problem
2002 Mitsubishi Galant 4 cyl Front Wheel Drive Automatic

I have read a number of other posts regarding speedometer not working.
What I am wondering is at the radio harness the yellow/black wire what should it show a ground or power? And if power what voltage?
This is the wire that is connected to a number of other modules including the cpu. I recieved the car with the wires bare and no radio. I saw the speedo work once
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Monday, August 16th, 2010 AT 10:04 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
After looking at the schematic, it runs through the CPU and other modules as you mentioned. When it goes through the CPU, it comes out to ground. Based on that, I would say it shouldn't have any power in it but rather is used as a ground. Here is the schematic. I hope it is big enough for you to see.


http://www.2carpros.com/forum/automotive_pictures/249084_5_47.jpg



Let me know if you have other questions. Also, there are two systems, one with an amp and one without. It does the same on both.
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Tuesday, August 17th, 2010 AT 12:40 AM
Tiny
PHATBOI
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So I tried grounding the wire and no change
My problem is the same as others that I have read, My speedo and odometer dont work.
I put another cluster in it and no change.
I put another transmission in it(mine was slipping)
no change.
I am left with a computer issue?
I hooked my scanner up to it on live feed and drove it and it didnt read a speed either.
What next, there was mention of a wire coming from the cpu to test?
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Tuesday, August 17th, 2010 AT 10:54 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
The only thing I can think of is the vehicle speed sensor. Have you checked that?
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Wednesday, August 18th, 2010 AT 1:40 AM
Tiny
PHATBOI
  • MEMBER
There are technically 3 speed sensors
1 input for the cpu
1 output for the cpu
1 for the sppedometer cluster
if one of the cpu sensors were bad wouldnt it throw a code?
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Wednesday, August 18th, 2010 AT 3:41 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
It should, but I have to say it doesn't always happen.
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Thursday, August 19th, 2010 AT 12:23 AM

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