rocket22

1997 Cobra - Temp Gauge Not Working well

I am in the process of replacing the intake/Plenum gaskets and have the coolant Crossover tube out. Both the Engine Coolant Temp Sensor Part#12A648 (New) and the Water Temperature Indicator Sending Unit Part#10884 (old) are mounted in this crossover tube.

Which part sends signal to the gauge on the dash? I am guessing it is the Water Temp Indicator Sending Unit Part#10884.

If so, what is the difference between these parts? When I log onto a number of sites to find this unit I only get one part, which one is it for? Is there a Ford Part Number site I can confirm a RockAuto or Autozone part?

How do I test this sensor?

BraMas

if i had to guess 10884 would be the sending unit for gauge and 12A648 is for pcm not sure why they needed 2 differnet for same job. Hell I made it worse and added another one on the block for a real temp gauge
http://www.fordparts.com/Commerce/Pa...&model=Mustang

rocket22

Finally got this 1997 cobra (only exhaust cat back mod) back on the road. I had a number of codes, 174,171, 308, and a few others. Replaced all intake gaskets and this car now runs great!! Thanks for all help on this site for the info!

Repairs still remaining:
odometer worm gear, replace MAL light, fix temp sensor gauge, cruise control, and temp sensor.

Since I had no history on this car replaced #12A648 for the computer but did not replace the Water Temperature Indicator Sending Unit Part#10884. How can I test Part 10884 and where can I get one online? Is there a replacement part number? Can I used the old 12A648 for the 10884? I know that sounds dumb, they look the same and have the same connection