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#1
10-06-2012, 08:37 PM
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Which pole on the sender goes to the temp gauge?
I have a 1987 300TD with a replacement engine from....I don't know what. But on the replacement engine, at the second core hole is a two-pole temp sender 008-542-56-17. From what I understand, this is from later models where one pole goes to the temp gauge and one pole goes to the afterglow relay. But, in my car, there's only a single pole lead, the one that goes to the temp gauge.
Rather than install a one-pole sender, I think I'll just connect the lead to one of the poles. Does it matter which pole? And, if so, which one is for the temp gauge?
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles 06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife 
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#2
10-07-2012, 01:20 AM
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can you take a picture of the sender?
I have an extra sender from my recently sold car that I changed due to a bad block ground... sender is fine.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#3
10-07-2012, 02:36 AM
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The W126 ETM says pin 1 is for the gauge and pin 2 is for the glow relay. Reference this picture (look familiar?) -
 Pin 1 is on the right, pin 2 is on the left, the plastic connector indexing pin is below. Let us know how that works. This might be the last time I can help anyone this way until I twist my own arm and get reading glasses. I'm still crosseyed from looking so closely at the sender to see the pin numbers. Sixto 87 300D
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#4
10-07-2012, 07:37 AM
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Quote:
You're doing well to last this long without reading glasses....I have 5 or 6 pairs stashed various places. I just need to come up with some makeshift way to get connectivity and then will report back....
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles 06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#5
10-08-2012, 11:40 AM
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We....have....CONNECTIVITY! Works perfectly. Now I just need to find a wire to connect permanently the lead to pole 1 of the sender.
Nice work, Sixto.
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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles 06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#6
10-08-2012, 12:57 PM
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Not only that, you can upgrade to the full benefit of an afterglow relay.
As Dave said, you can use the connector housing from the 2-pin side of the 3-pin temp switch on the upper radiator hose fitting. A windshield washer pump motor might use the same connector housing. Sixto 87 300D
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