49 ford engine swap
- Thread starter beerslob
- Start date
Kurt in NJ
Well-known member
One side sensor has 2 terminals, one goes to car harness, other wire goes to single wire sensor on other head, the 2 wire sensor is just a switch, when it trips the gauge goes full hot
nelsb01
Well-known member
1949.....check to see if your car had an V-8.
Engine compartment, passenger's side, behind the hood hinge, should be the data plate.
In the third position if it is B - then it started life as a V-8. If the third position is an H - it started life as a 6 cyl.
Hope this helps.
Engine compartment, passenger's side, behind the hood hinge, should be the data plate.
In the third position if it is B - then it started life as a V-8. If the third position is an H - it started life as a 6 cyl.
Hope this helps.
big job
Well-known member
Sorry but a 6 or V8 in all case's one wire from gauge goes to a make and break sender found on the left head. When cold the left sender points are closed shooting a signal to the right sender to the dash gauge. Ok, so simple a V8 has a split cooling left and right or they would not have two water pumps. All temp. signals come from the right one wire
sender now if the left head gets up to hot, this sender opens meaning an open line to the dash >>>>HOT another word is removing dender wire from the dash the needle goes HOT. You ground that wire with jumper needle goes to cold so thats good. So you need a one wire sender. And then I have a couple trucks with a 337V8 and these have only one , one wire sender (not too like smaller V8s.)
sender now if the left head gets up to hot, this sender opens meaning an open line to the dash >>>>HOT another word is removing dender wire from the dash the needle goes HOT. You ground that wire with jumper needle goes to cold so thats good. So you need a one wire sender. And then I have a couple trucks with a 337V8 and these have only one , one wire sender (not too like smaller V8s.)
Aarongriffey
Well-known member
You only need the single wire sender. Run a wire from it to the gage.
As Big Bob says above, that two wire sender just breaks the wire in two at a certain high temp.
When that happens the gage will peg itself on hot.
As Big Bob says above, that two wire sender just breaks the wire in two at a certain high temp.
When that happens the gage will peg itself on hot.
Aarongriffey
Well-known member
On my ‘51 I ran the left wire to the gage.
Then I bought an Auto Zone temp gage and run it off the right side just because I could.
They both have always read the same. But when the are both in the normal range I feel pretty certain the temp is ok.
Then I bought an Auto Zone temp gage and run it off the right side just because I could.
They both have always read the same. But when the are both in the normal range I feel pretty certain the temp is ok.
JSeery
Member Emeritus
What are you calling right and left? The two terminal sender should be on the left (drivers side) and the single sender on the right (passenger side). This for U.S. Left hand drive. The wire goes from the gauge to the two terminal sender and then to the single terminal. Only the single sender provides a variable temperature reference to the dash gauge, the other one is an on/off switch that is set to a specific temperature.