Stonecat Posted April 8, 2021 Report Share Posted April 8, 2021 Good afternoon a question for you - having just bought a used fuel tank for my TR4 restoration how can you test the sender unit before installation - currently the body is still off so no wiring loom or gauges to assist ! Thanks on anticipation Alan Quote Link to post Share on other sites
RobH Posted April 8, 2021 Report Share Posted April 8, 2021 (edited) Do you have an Ohmmeter Alan? If so measure the resistance from the sender output to its body. With the arm up (tank full) there should be a resistance of around 20 Ohms or so. Lower the arm slowly and check that the resistance increases evenly with no jumps. When the arm is fully down the resistance should be about 240 Ohms. The actual resistance values may vary a bit. The important thing is the even change with no jumps. Edited April 8, 2021 by RobH duff gen corrected Quote Link to post Share on other sites
Lebro Posted April 8, 2021 Report Share Posted April 8, 2021 Agree with above if it was A tr2/3, but a tr4 should (I think) have the bimetalic strip type of gauge, powered from a voltage stabilizer, & the sender works the other way round. Low resistance at the full end, & high when empty. Bob Quote Link to post Share on other sites
RobH Posted April 8, 2021 Report Share Posted April 8, 2021 I've realised that and edited it Bob. Quote Link to post Share on other sites
Stonecat Posted April 8, 2021 Author Report Share Posted April 8, 2021 Thanks guys I have got an Ohmmeter and will give it a try - thanks again by the way bob your picture reminded me I also had a T120 1966 lovely bike - wish I still had it . Alan Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.