V6 turbo coolant temperature

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simontaylor

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Re: V6 turbo coolant temperature

Postby simontaylor » Sat Jul 28, 2018 5:06 pm

well done, good work. Unless you already know, the Legend JohnC has made a few detailed "speedo fix" posts in the members area.
1986 : '86 GTA v6 BW-EFR turbo, with Adaptronic ECU
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claudiu_rem

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Re: V6 turbo coolant temperature

Postby claudiu_rem » Sat Jul 28, 2018 5:43 pm

Yes, I know I have read all the posts, changed the electric speedo motor, gearbox sensor and checked the wiring. Still nothing. I need to know on what pins does the signal come from the gearbox sensor. I have a repair manual until 87 models and looks like I have different plugs behing the gauges. I have an 89 model. I want to check with an osciloscope if i receive signal from the sensor. If the sensor is ok, the gauges might be the problem
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Re: V6 turbo coolant temperature

Postby JohnC » Sat Jul 28, 2018 9:51 pm

claudiu_rem wrote:I need to know on what pins does the signal come from the gearbox sensor.

All the connectors are the same which ever model year the speedo is installed in.
Here is a diagram of the pinouts of the large 15 pin connector mounted on the left hand side of the instrument unit.
Take no notice of the info on the bottom of the page which is irrelevant for your purposeses.
As you can see, the speed sensor signal comes in on the second row down from the top.

Speedo pinouts.jpg
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Re: V6 turbo coolant temperature

Postby JohnC » Sun Jul 29, 2018 9:10 am

Have you done this test making sure you are connecting the 6 volt battery to the correct speedo board connector ...... The SMALLER one of the two .... Red & Black wires ?

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Re: V6 turbo coolant temperature

Postby claudiu_rem » Sun Jul 29, 2018 10:06 am

Yes, the speedo works when i supply 6v. I will check if the sensor sends signal in the plug behing the dash. If the signal is ok, what could not work in the gauges?
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Re: V6 turbo coolant temperature

Postby JohnC » Sun Jul 29, 2018 2:32 pm

We have had trouble before of a member not fitting a speed sensor correctly. The sensor must be inserted fully so that the holding bracket sits on the flange marked on the picture below by the arrow, not where the small screwdriver is pointing.
I suggest the shaft where the "O" ring is positioned is smeared with an All Purpose Grease before inserting.
Could be worth checking.

Speedo clamp.JPG
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Re: V6 turbo coolant temperature

Postby darrenbiggs » Sun Jul 29, 2018 5:07 pm

Have you done this test making sure you are connecting the 6 volt battery to the correct speedo board connector ...... The SMALLER one of the two .... Red & Black wires ?


I can tell that example picture isn't my speedo unit John, it's about 110,000 mile short! :-)
I'm just here for the gasoline.
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Re: V6 turbo coolant temperature

Postby JohnC » Sun Jul 29, 2018 5:36 pm

darrenbiggs wrote:I can tell that example picture isn't my speedo unit John, it's about 110,000 mile short! :-)

........... I am afraid I can't remember who's unit it was. :?
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