Well on Saturday i met the new owner Conrad and his wife when they dropped off the car at the workshop.
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He is new to MR2s, but is on the ball with all things mechanical and electrical.
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He lives in the North Sea, well on the Shetland Islands,
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(same difference
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), so is leaving the car with me and collecting it next time he is on the mainland.
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So this morning i decided to get stuck in.
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I decided to forget all tests done remotely, and to start afresh with the car in front of me and my own diagnostic tools.
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To eliminate the engine loom, i made Karl a test loom back in November.
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This was simply a 3 pin alternator plug, with the three wires extended by 6 feet, each one labled and terminated in a ring terminal.
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The idea being it could be plugged in to the alternator, and connected to the fuse box, thus eliminating the engine loom.
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So first test was to confirm the current drain
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- confirmed at 450mA.
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Alternator unplugged, and test loom plugged in and connected
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- current drain 30mA.
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Fault found in 12 minutes.
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In a nutshell, Toyota's wiring colours are different to Lexus, and whilst soldering the Lexus plug onto the 3S loom, i mistakenly connected the IGN and ALT SENC wires the wrong way round.
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So wires corrected, and no more current drain.
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I can't suggest why Karl got a different result when he used my test loom, but ulimately that doesn't matter, fault fixed.
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Needless to say, Spring has come early to Conrad in the North Sea.
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