OMIX 17209.05 Water Temperature Gauge for 72-86 Jeep CJ Series

Always the right part

Got this instrument cluster temperature gauge along with the compatible OMIX ADA temperature sending unit . I did find it was necessary to reverse the mew temp gauge S and A position because of a wiring issue during manufacture . Polarity may have been reversed during 12 volt manufacturing . It’s strongly suggested to replace fuel and temp gauge as a pair . You’ll want both to be 12 volt compatible as the original were 5 volt with the jumper strap being a voltage regulator limiting the ignition 12 volts reduced to 5 volt operation . Clean all contact surfaces cluster to dash and gauge to cluster for good contact . Make certain that the gauges mount correctly and they don’t move upon assembly while bolting them down . Don’t over tighten . In my case , the temp gauge pegged due to polarity issue . If this happens , call OMIX ADA. tech assistance 1 800 449 6649 . I did , just to confirm it was a polarity issue . They told me just switch the temp gauge A and S. position . I just made a new jumper from 14 gauge stranded wire and two ring crimp connectors . The original jumper won’t reach . Easy fix . Worked fine . I suggest carefully installing as I’ve wrote first and observing results . My fuel gauge worked but temp gauge pegged . OMIX ADA got me going again , one call to tech support . Nice folks . Even if your upset , be cool with them , they’ll help you out . I’m sure they’re well aware of the issues . The gauges will work , we just have to install them carefully and correctly . One week now and working fine . They probably need to be calibrated but I’ll do that when I feel more ready . For now , I’m happy my fuel and temp gauge actually READ !

I purchased an entirely new 0-85 mph OMIX gauge cluster two years ago for an 83 CJ restoration project. Installed it and it worked well in the beginning, the only issue I have had (as many others) and chased every which way possible (as many others) was with the temp gauge. Fuel gauge works proper. The temp gauge worked for a short period of time and then started registering hot. To the point even before starting on cold mornings the gauge would climb up about 1/4 of the way with the ignition just in the on position. Crank up the engine, come up to temp 180degF checked and verified with a digital temp gun and the temp gauge in the cluster would peg. I read all kinds of trouble shooting articles, replaced wires, changed sensors multiple times which appeared to "fix" the issue but it alway came back like a bad gremlin. Note: I never replaced the temp gauge in this new cluster. Here is what I found to be a solution for my issue. After taking the cluster apart to check the gauge mounting, grounding, and all the recommended suggestions, (which I suggest to hold off on.) Check this first... The new OMIX gauges do have a 12V input. The sensor however still requires a 5V source, there is a 12v to 5v internal resistor built in to the new OMIX temp gauge versus the old strap between the fuel gauge and temp gauge that reduced voltage. As a test I disconnected the wire at the temp sensor, used a volt meter connected (+) to the sensor wire and (-) to the temp sensor, turned the ignition to on and the voltage on the sensor wire read 6.48v. As a 2nd test (and now permanent install) I purchased a mini 12v /5v voltage regulator (found online ~ $12, waterproof) I disconnected/ removed the 12V jumper wire from the fuel gauge to temp gauge and connected the new 5v power source to the (A) connection of the temp gauge only and BINGO! the temp gauge reads proper, voltage checked again on the sensor wire is now 5.11v. Fuel gauge still has the 12v input on the (I) connection and works. DONE!!