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#1
03-07-2010, 12:21 PM
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How to retrofit newer outside temp gauge?
I purchased a replacement outside air temp indicator for my '87, and find that the only way I can use it is to also update the 4-pin plug in the vehicle with the newer 5-pin plug. I can't find either plug in the EPC (although doubtless it's there somewhere).
Strangely, the relevant service manual page shows the older setup as having 4 wires (which it does), but has them connected to pins 1, 2, 3, and 5. Pin 5 doesn't exit on the older gauge. Has anyone replaced their older 4-pin gauge with a newer 5-pin unit? How did you wire it?
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Rob 
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#2
03-07-2010, 02:34 PM
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There are lots of threads on this situation here on this forum. Use the search function and you will find them.
Pin# 4-pin plug 5-pin plug 1 Black/red to +12V Brown to ground 2 Brown to ground Gray/blue to illumination 3 Green to sensor Green to sensor 4 Gray/blue to illumination Green/yellow to speed sensor 5 Not used Black/red or black/violet to +12V You can put the pins onto the terminals without the plastic plug and use tape to insulate. I might have a spare 5-pin plug I can let you have. Jeremy
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 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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#3
03-07-2010, 04:19 PM
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After searching fruitlessly for 20 minutes, I gave up and posted. I knew I'd seen threads on this in the past, but couldn't track them down. Sometimes I just don't think of the right keywords...
Sure, if you have an extra plug, that would be wonderful. I'd even send you a self-addressed padded envelope. Could you PM me with your address? Thanks!
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Rob
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#4
03-07-2010, 05:50 PM
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The speed sensor wire that Jermy mentions is a junction block just above the steering column behind the IP.
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 Gone to the dark side - Jeff
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#5
03-07-2010, 07:17 PM
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PM sent.
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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Linear Mode
