Area 52
New member
- Joined
- May 12, 2009
- Messages
- 31
- Reaction score
- 0
- Points
- 0
- Location
- Newport Beach, CA
- Vehicle Year
- 1990
- Vehicle
- Ford
- Engine Size
- 2.9
Saturday...gauge was reading 1/3rd from cold with hot engine (normal condition). Didn't go to church Sunday and God's wrath struck my BII engine temp gauge. The gauge started out normal but quickly (within a few minutes from cold engine) moved up to full hot...like the red glow around the edges of hell's door hot.
Therefore, broke out the ohmmeter. Disconnected wire from sender to gauge and measured the sender at 317 ohms cold engine & 77 ohms hot. Repenting and sore from flailing my back...I read through the King Ford Bible...it states to use inline resistors to troubleshoot. 9 ohms for a hot gauge and about 75 ohms for a cold gauge. Therefore...is it safe to say the sending unit is shot if I have 77/317 ohms or might there be a secondary set of resistors up by the gauge or instrument cluster which drops my high readings down before it hits the gauge???
Therefore, broke out the ohmmeter. Disconnected wire from sender to gauge and measured the sender at 317 ohms cold engine & 77 ohms hot. Repenting and sore from flailing my back...I read through the King Ford Bible...it states to use inline resistors to troubleshoot. 9 ohms for a hot gauge and about 75 ohms for a cold gauge. Therefore...is it safe to say the sending unit is shot if I have 77/317 ohms or might there be a secondary set of resistors up by the gauge or instrument cluster which drops my high readings down before it hits the gauge???