403 Petrol Tank Sender Unit
Quote from Andrew Sait on 26 November 2020, 17:59Can anyone tell me what the resistance range should be for the tank sender unit. My car has at some time in its past had an after-market unit fitted which does not seem to properly drive the petrol gauge. It has a resistance range of empty 15Ω (where the gauge shows empty) and full a resistance of 129Ω where the gauge shows just slightly above empty, so something is not right.
Any help gratefully received.
Andrew Sait
Can anyone tell me what the resistance range should be for the tank sender unit. My car has at some time in its past had an after-market unit fitted which does not seem to properly drive the petrol gauge. It has a resistance range of empty 15Ω (where the gauge shows empty) and full a resistance of 129Ω where the gauge shows just slightly above empty, so something is not right.
Any help gratefully received.
Andrew Sait
Quote from Michael Brooks on 30 November 2020, 23:30My 403 fuel gauge sender looks original. I measured it this evening at 10Ohms to 80 Ohms. I have not run the car since I bought it five years ago (its in bits undergoing a major DIY restoration) but I do know that it had some fuel in the tank and was reading something sensible at the dashboard when I drove it into the garage all that time ago. I also temporarily connected the sender unit to the gauge and manually moved the float over its range and the gauge responded as expected. Hope that helps.
Mike 403-1402
My 403 fuel gauge sender looks original. I measured it this evening at 10Ohms to 80 Ohms. I have not run the car since I bought it five years ago (its in bits undergoing a major DIY restoration) but I do know that it had some fuel in the tank and was reading something sensible at the dashboard when I drove it into the garage all that time ago. I also temporarily connected the sender unit to the gauge and manually moved the float over its range and the gauge responded as expected. Hope that helps.
Mike 403-1402
Quote from Andrew Sait on 19 December 2020, 09:47Mike,
I have now seen your reply. On Andy Gibbs advice I purchased a sender unit listed as for the Jaguar XK150. I tested it before I fitted it and the resistance range is exactly as you have outlined above.
Many thanks for your reply.
Kind regards,
Andrew Sait
Mike,
I have now seen your reply. On Andy Gibbs advice I purchased a sender unit listed as for the Jaguar XK150. I tested it before I fitted it and the resistance range is exactly as you have outlined above.
Many thanks for your reply.
Kind regards,
Andrew Sait