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Strain Gauge Shift Lever

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I have a used Motorsport Systems MS-GLCA1-V3.0 strain gauge shift knob. I have put 12v and ground into it and would expect an output in the 0 to 5v range depending on how hard you are pulling the lever. I get 0v at all times.

It appears the manufacturer is out of business (or at least I can't find them). I'm hoping to get some guidance on how to trouble shoot this or test or repair. There can't be too many components to this so I'd like to see if I can get it working before shelling out $1000 on a replacement.

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Hi Adrian,

It should float without load on it at ~2.5V and go up or down from there depending on the direction the strain is applied to it.

Based on the sticker on it, you've hooked it up properly, and as Stephen said, it should be in the middle of the voltage range at about 2.5 volt at rest.

You can double check the power, ground, signal with a multimeter, but there's not much to the system, so not a lot to check.


Did this end up working out for you?

Yeah, it did thanks.

My analogue input into the ECU was being pulled to ground. Everything looked OK in car (power, ground etc) but the grounded ECU input pulling the strain gauge output to ground threw me. I tested on the bench and it was OK, so then just used a different analogue input to the ECU. Haven't gone back to check if it was a wiring issue or a fault/config problem on the ECU input.

Car is now flat shifting up very nicely with the ECU throttle cut. Wish there was a reliable way to get to downshift blip on a H pattern!

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