Where Are The Oil & Temp Sensors?

Ha...My 9 volt was fine, the terminal was crusty from sitting. I cleaned it up and used the digital meter and tested both the old sender and the TS4. You're right, the digital is WAY better. Both senders are good. My temp gauge must be shot. How do I fix the stock temp gauge?

 

Thank Tim...I'll give it a look.

 

Performed a COMPLETE speedometer overhaul. Thanks for the link Tim, I tested everything as the instructions indicated and it all checks out.


I disassembled every bit of the speedo including removing the face of the temp gauge. I discovered a very fragile broken wire inside. I was able to repair the wire and now having a operating temp gauge. I did Tim's suggestion of momentarily touching a lead to the block and the temp gauge moved...YES!

The only issue now is the sender seems to be bad despite the positive testing results I got the other day. I couldn't find the right size sender or adapter to fit the manifold. Maybe there is another location on the manifold for the TS4?

 

I'm assuming the sender is bad because it never moved from cold. Maybe I need to go for a longer drive?

Yes there's a thermostat. I don't know which one.

I looked all over the brass section last week and the threads weren't right. I need to go to a store with more options than Lowes.

 

I've been doing almost everything this site suggests - http://www.civilianjeep.info/Strenk/Gauge%20web%20page/basic_troubleshooting_for_cj_gau.htm

Temp. gauge calibration:
C (cold)........................ 130 degrees--73 ohms
Beginning of band.......... 171 degrees--36 ohms
Top of band.................. 242 degrees--13 ohms
H (hot).......................... 270 degrees---9 ohms

I started with 60 ohms because I'm stupid and had the sender wire connected at first. The ohms jumped all over the place (almost went and bought a new DVM...lol). My engine has been running for a good 10 - 15 minutes and the current ohm reading is 48.

There is still no needle movement unless I touch the sender to the block (just to verify my repair is holding). There must just be a huge threshold on the gauge reading?

 

Yeah.

But I'm going to try another idea first. I went to go get a new battery for my infrared thermometer and decided to go hit the parts store and buy the TS4 (again). I also asked for the TS6 I bought last week and fit in the manifold. They only had the TS4 and said they could have the TS6 here by tomorrow. I told him I only needed the TS6 to match threads so I could search for an adapter. He said they sell adapters why didn't the other guy tell me that last week when I was there and specifically asked if they had adapters?! Plus last week when I returned the TS6 in exchange for the TS4 the same guy said they were the same price. Today the TS4 was $4 less...He's a complete liar. I'm considering calling the manager and letting him know. It's disappointing because they've had almost everything I've needed in stock.

As soon as the Jeep cools down I'm going to install the TS4 and I'll be back with results.

 

Thanks for the extra links.

Well, I think I'm going to move on to something else. The sensor tests perfect at the ohm readings but the gauge still isn't responding.

 

While at Lowes I couldn't find an adapter that allowed the TS4 to seat deep into the adapter. Turns out the one I bought from the parts store doesn't seat any deeper. Oh well...Time wasted, project delayed? Yes.

Yes.

 

Bought a NOS temp gauge and every bit of the speedometer works as intended...Thanks guys!