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I’ve spent a while playing with my my sender - I think it’s now buggered. It wouldn’t work, then had a spell working again, now seems to have given up again.
I was kindly lent a couple of senders, both 4 wire types. I tried improvising their use but failed. I did deduce that there seems to be a circuit in the sender that stabilises (for want of a better word) the output, presumably to stop the lamp flashing on and off when the fuel sloshes around. This circuit does mean that you can’t simply get a believable result if you try testing the device with a multimeter though. I need a new one myself, but the cost seems prohibitive. I’ve been using the trip meter instead, but the speedo cable broke as I left home recently.
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