Made in usa fuel sender for jeep cj and other jeeps
OK well I'm looking at some replacement gauges, but some say they need to be changed together, is there a reason for this or is this just certain brand gauges ??
As said above John's Strenks write ups on gauges are the best. Since you said the power was not pulsing sounds like you have read Johns write ups on trouble shooting jeep cj gauges.
The Fuel Gauge is part of the speedo. It has two bimetal springs adn wire wraped heater coils. One is the voltage adjust for the fuel gauge and the temp gauge. The heat coil wire heats the bimetal spring and it opens a contact and drops the 12V apply voltage.... Cools off and closes the points/contact again and starts the heat cycle. This contact/point is what you tested for looking for the pluse output of the bimetal/contact piece. The second bimetal deflects the pointer in the gauge and his heated by the lower pulse voltage of the first bimetal. Just got done doing this myself and calibrating the gauge and sender together..... yes they can be calibrated.
The CJ fuel sender and Guage are NON LINEAR meaning the F to E has a range 10-70 ohms but half full is not half way on OHMs. Linear half way would be (70-10)/2 +10 or 40 ohms. But the CJ is non linear and half way is 22 ohms if memeory serves me right...
So we need the gauge and sender to match.... Very hard to get a CJ sender the Crown ones fail pretty quick and the new more current senders and gauges are linear often.... So then looking at mtd hardware, height, floats.... its a bit of mess...
I and bud are cking a USA maker of the CJ Senders and could be good solution for many of us jeepers. more later on this...
MADE IN USA FUEL SENDER FOR JEEPS
MTS Company
MTSCompany.com
800-522-1622 M-Friday central time
CJ-su-1 is their part # for CJ its $29.95 and $5.3 shipping
one year warranty... but has platic float...
includes the filter on pick up, new mtd gasket, new lock ring
making these for the past 23 years they told me
MANY jeepers do not know aobut them....
Can also buy this sender from Quadratec
So.....
I suggest test your fuel & temp cluster with the point to point tests. IF bad the fuel gauge can be swaped with any 76-86 CJ speedo fuel gauge all the same. Run thru a point to point test before buying fuel gauge. Many I just tried to buy failed the point to point testing even tho owner said it was a good speedo or fuel gauge. The output of fuel sender can also be tested with a mutlmeter resistance. Tank full will be 10 ohms or close..... Empty Tank, carry some gas in can, then measure emplty will be close to 73ohms. Senders like to loose ground via the little ground wire......... major fault location with jeep fuel indication. Also if you change the sender swap over the brass float they are better. Keep the extra floats that are brass and not leaking if come acrosss one.
that should get you fixed up...