Thermometer reading 210
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
If your temp sensor is like mine ('71 sb), it is on the right side of the engine block. It has a black wire running from it. As mentioned above, the work you did either damaged that wire (in the engine bay area) or you broke/dislodged wiring when you were under the dash installing the tach cable. There is no relationship between the tach and the temp sensor...only that you were working in the same general area where they are routed.
Safety Car
Joined: Mar 2000
Posts: 4,078
Likes: 27
From: Northeast South Dakota
The temp sensor is in the head on the side, kind of between the exhaust ports. It could be in either head, depending on what work has been done in the past. It has one wire on it. Take that wire off and run a jumper to ground there to see if your gauge works. You probably just pulled that wire off of the sensor. After a number of years the plug that goes on the sensor gets kind of loose.
-Justin
-Justin
