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High beams issue!

Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
Bulb burned out?
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Friday, April 17th, 2009 AT 8:01 PM
Tiny
MBENCO
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  • 184 POSTS
Thanks James: I'll check it out. I hope it's that simple.
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Friday, April 17th, 2009 AT 8:03 PM
Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
I would have thought you would've already checked that.
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Friday, April 17th, 2009 AT 8:33 PM
Tiny
MBENCO
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  • 184 POSTS
Hi guys: The reason I didn't check the bulb out was because I thought it was good. I took the cluster apart and checked the bulb with a continuity tester and the bulb checked out OK. SO what do you think? Any ideas why the check engine light won't come on when I turn on the ignition?
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Saturday, April 18th, 2009 AT 2:19 PM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Hey Mike.

A couple of weeks back, you said the check engine light was on ALL the time ?? when did it stop working ??


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Saturday, April 18th, 2009 AT 7:30 PM
Tiny
MBENCO
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Hi Dave: I'm not sure but I think it may have been when I replaced the computer.
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Saturday, April 18th, 2009 AT 7:43 PM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Do you still have the old computer ? as this was obviuosly not the fault ... plug it back in ?? see what happens ....was the replacement a NEW or USED computer ??


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Saturday, April 18th, 2009 AT 7:58 PM
Tiny
MBENCO
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Yeah Dave : Yes I have the old one and I already tried plugging it in and the light is still out and it won't start. It was a used one.
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Saturday, April 18th, 2009 AT 8:12 PM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
First check the EFI fuse in underhood fuse/relay box .. also check the gauge fuse !!


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Sunday, April 19th, 2009 AT 8:29 AM
Tiny
MBENCO
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  • 184 POSTS
Mornin Dave: Checked all fuses and all were OK.
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Sunday, April 19th, 2009 AT 8:55 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Morning Mike.

You need to check you are getting power to ECM very first pin #1 (white/blue wire)and check the ECM is grounding the CEL pin #5 (green/red wire) .. obviously check the #5 with ECM plugged in and someone turning on ignition for you because it will only ground it for a few seconds unless there are codes stored !!


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Sunday, April 19th, 2009 AT 9:35 AM
Tiny
MBENCO
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  • 184 POSTS
Dave:The #1 pin has 12 volts going to it. The #5 pin also shows 12 volts when ignition is turned on.
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Sunday, April 19th, 2009 AT 9:50 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Hey Mike.

Does the #5 go off (loose voltage) after a few sec's or stay @ 12 volt's ... also what is the car doing ie. TONF (turnig over not firing) or is it doing nothing at all ?


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Sunday, April 19th, 2009 AT 10:00 AM
Tiny
MBENCO
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The voltage stays constant and the car is turning over and not firing.
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Sunday, April 19th, 2009 AT 10:08 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Hey Mike.

If the voltage is constant you have a code stored !! and the ECM is lighting up the CEL so you must have break in the red/green wire to the CEL .. assuming the bulb is a good one ... can you flash for codes again for me ... I want to know the codes but also that the ECM is functioning correctly by giving us the codes ?


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Sunday, April 19th, 2009 AT 10:16 AM
Tiny
MBENCO
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I can't flash for codes because I need the CEL to light up in order to count the flashes.
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Sunday, April 19th, 2009 AT 10:20 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Hey Mike.

I knew you were going to say that .. LOL .. think outside the box dood ... you knew the answer to this all along ...rig up a test bulb to the red/green wire and a good ground ...and it will flash for you !!


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Sunday, April 19th, 2009 AT 10:24 AM
Tiny
MBENCO
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Dave: I can't figure out what's going on with the readings I get. When I hooked up a test light to the #5 pin it wouldn't light up and yet the meter (new one I just bought) shows 12volts. I swapped out ECM and same thing. The test light was purchased at autozone and I also tried it on the #1 pin and it worked. So it's not the meter or the light. What amI doing wrong?
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Sunday, April 19th, 2009 AT 11:05 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Unplug the the connector at the gauges (dash) and tell me if you are reading 12 volt's to the CEL bulb wire?
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Sunday, April 19th, 2009 AT 11:16 AM
Tiny
MBENCO
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Which connecter are you refering to?
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Sunday, April 19th, 2009 AT 11:20 AM

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