Greddy Egt Instructions

[BHDave]

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

[JaseR33]

Hi Dave,

Can you post how you wired up the EGT gauge. I got the same one but am unsure what colour wire is what...would appreciate if you could give me a few tips.

Cheers

Jason

[raz0r$harP.UK]

You can get a manual from www.greddy.com for the warning series meters. Has wiring instructions and operating information.

[BHDave]

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]

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.

Edited November 20, 2006 by heller44

[BHDave]

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.

[heller44]

Reading it with a decent dmm I get 1.6Ω or 2.7Ω depending on polarity @ ~35°c. weird.

[BHDave]

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