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Greddy Egt Instructions

BHDave

By BHDave,
in General Automotive Discussion

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BHDave Grand Master

BHDave

Posted
Posted

Hi guys,

I've got a Greddy egt that i picked up second hand recently. It's the model with the separate module that sits under the dash and a fairly hefty flying loom to the back of the gauge.

I've had a look for instruction manuals but haven't been able to find one for this model of gauge.

I have hooked it up correctly so that i can set the peak hold temp using the small pot on the under dash module , the peak hold light turns on and off when i push the button on the gauge and i have the back light working correctly but can't figure out how to get it into real time mode.

When i push the on/off button on the module it will either sit at the peak hold value when on or sit at the max temp when off. When i turn the car off it will drop back to zero.

The check light stays on whether its on or off with the ignition on.

Does anyone have a link to the right manual or can tell me how to work it. I suspect the sensor is either stuffed or there is a break in the signal wire. I have tried a second module and gauge with the same results so can rule out that section as being faulty.

Please help!

Cheers,

Dave

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BHDave Grand Master

BHDave

Posted
  • Author
Posted

The instructions on the greddy site are for a different type of gauge to what i have. They have the peak hold adjustment on the gauge itself, mine has it on the under dash bit.

Mine has 3 wires to be hooked in, red and black which are power and earth and white (i think) which is lights.

There are other greddy gauges with 4 wires where red is battery power and orange is switched ignition with black and white the same as above.

heller44 Mentor

heller44

Posted
Posted (edited)

BHDave, It sounds like it is the same as the greddy egt and oil temp gauges that I have.

Pressing the button on the brain unit puts it into a set mode for setting the peak limit before warning light is activated. When in peak set mode, there should be a red light on (I think).

Make sure you are out of set mode and it should all be good, red light off and button out.

I thought that both my gauges were borked when I bought the car. Both were left in set mode and hidden in the dash. Instruction on the greddy site are for the later version.

I don't have a pic of the control unit and button, but here is a pic of the gauge for comparison.

If you need wiring pinouts, It'll have to wait till the weekend, It is all buried inside my dash and will take a while to uncover.

post-16250-1164015986.jpg

Edited by heller44
BHDave Grand Master

BHDave

Posted
  • Author
Posted

That looks like the one.

Could you do me a favor and check the resistance of the thermocouple? I think mine's borked as the gauge goes to max temp when i press the on off switch with it connected, but goes to zero with it unplugged.

BHDave Grand Master

BHDave

Posted
  • Author
Posted

Thanks mate, I appreciate you taking the time to check it for me.

I have checked mine at 2 separate times. It came in around 2 ohms on a hot day and about 1.7 last night.

It may be the cable thats stuffed as it's about 8 ohms at the end where it plugs into the unit. hmm, time to make a new cable and see what happens.

Cheers

Dave

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