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Discussion Starter · #1 ·
I was wondering if anyone could help me with a problem I'm having. Yesterday I installed a boost and a knock gauge in my 86 GN. When I finished and started my car, the speedometer would light up (digital dash), but it won't register any speed. Also my service engine soon light is on (I'm assuming this is because my speedometer isn't working?). I rechecked all of my work and it looks like everything is properly installed, but I can't get it to work. Any help is greatly appreciated.
 

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Resident Idiot
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Pull the code, sounds like the VSS went bad or became disconnected.
 

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Turbocharged BrunoStachel
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Do the gauges you've added work okay too? If you removed the cluster than I bet the speedo cable isn't attached. If it lights but no speed than it has to be the cable. The VSS doesn't control any functions on the digital itself but if the cable isn't spinning than it should throw a code 24. Double check the cable.
 

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Discussion Starter · #4 ·
Where exactly is the speedometer cable? Is it under near the steering column? I'm sorry for my ignorance, but I'm just learning about cars. My boost gauge does work, but the only thing on my knock gauge that works is the power LED. I am hooked up to the correct wire on the computer for the knock gauge and I checked continuity of the wire, which appears to be ok. Also I don't have the necessary equipment to pull codes. Where might I find something to do this, as it seems it would be benificial for future, as well as current use. Thank you.
 

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Discussion Starter · #6 ·
Thank You so much for the information, I had no idea I could check the codes like that. I found that I have a short in the wire going from my knock gauge to the computer, but I still have no speedometer. I'm going to pull my cluster tomorrow and check the connectons.
 

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You should find all the information you need at www.gnttype.org :headbang:
 
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