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Discussion Starter #1
Is there a fuse, or relay, that controls the cruise control? Mine just died this morning.

Normally I would search but as we know...

 

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1994 S600 Coupe, 1995 S600 Coupe
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I posted this info here several days ago on how to search. Works well.


Jon
 

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1994 S600 Coupe, 1995 S600 Coupe
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Is there a fuse, or relay, that controls the cruise control? Mine just died this morning.

Normally I would search but as we know...

According to Starfinder, fuse 23 in the front fuse box directly feeds the cruise control stalk its power. That stalk simply switches 12v from the fuse and feeds it to various EGAS pins depending on which direction it's pushed. Everything else is controlled by the EGAS module in the coffin box.

Jon
 

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Discussion Starter #6
Thanks. I exchanged my 140 545 41 32 EGAS module with a 140 545 69 32 with no joy. I also read that I should have a 140 545 32 32 instead.

Is there a chart/guide that indicates what modules apply to what models? Mine is a 1995 S500
 

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1994 S600 Coupe, 1995 S600 Coupe
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Sedan or coupe? It can make a difference. Last six numbers of VIN will also help.

Only source I know of is EPC. None of those numbers match what I'm seeing for the EGAS module.

Jon
 

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41 32 is for an S320. 69 32 is for a 400SE or SEL. 32 32 is for a Euro 500S, SE, or SEL.

So none are correct for a US 500S. No wonder cruise doesn't work!

Jon
 

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Discussion Starter #11
Thanks for your help.

Made a mistake on the first one... should have been 71 32
 

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Ok, here we go:
Latest version: 1405457132
Middle version: 1405457232
Earliest version: 1405451532

The two earlier versions supercede to the latest. And yes, 7132 is later than 7232. However both say to use up old stock first, which means there won't be significant differences between them.

From what I've seen elsewhere, cruise is the first thing to not work if mismatched EGAS modules are used in cars. Maybe a safety thing?

There are a bunch of all versions on eBay. Some are priced ridiculously high, but you can get one for well under $100. EGAS modules aren't high failure items unless bad throttle body wiring takes them out, and then they don't work at all.

Jon
 

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1994 S600 Coupe, 1995 S600 Coupe
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Just saw your post on 71 32. I'd put it back in and look for your cruise issue elsewhere first. Maybe your stalk is bad?

Jon
 

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Discussion Starter #14
Thanks... I'm also leaning towards the switch being the culprit.

Btw, the cc worked fine since I bought the car almost a year ago.

Again, thanks for your help.
 

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Here's a portion of the wiring diagram. S40 is the switch, F3 is the fuse, and N4/1 is the EGAS module. The stalk looks easy to test for continuity once disconnected under the dash.
 

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'93 300E 2.8, '95 S320, 99 S320
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Cruise control not working might be simply the brake light switch, despite no brake light problems. Just replaced in a new to me 1999 S320 and cruise started working after switch was replaced. Had similar issue in my 1995 S320, but speedo also stopped working at the same time, which was caused by left front speed sensor.

Sent from my KFSUWI using Tapatalk
 

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'93 300E 2.8, '95 S320, 99 S320
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The brake light switch is located beneath the instrument panel near the brake pedal. I generally don't recommend throwing parts at a problem, but for the $15 cost of a part that is commonly fails, it is worth a try imo.

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