[W126 Coupe] FW:

[Dick Spellman]

Hi Kelly,

Try the following re:high idle.  OVP relay, temp sensors and throttle 
plate position after you swap the air idle valve.  Clean the new idle 
air valve so you can clearly here the valve  (solenoid) moving up and 
down with the temporary application of 12vdc to the two pins where the 
harness plugs in.  I just went through the entire process with Markus 
Meyer and he finally sorted this out by checking the temp sensor and 
harness.  But, it can be many things and is best resolved using the 07.3 
section of cd manual trouble shooting flow chart if the above fail to 
resolve the high idle. 

Horns are positioned in two locations.  The fanfare (low tone) are under 
your headlamp housing to the driver's side (at least this is true on my 
euro with left side steering).  The highway horns are right up front on 
the brace in front of the ac condenser.  Just lift the hood to locate.  
Remove harness and apply 12vdc to see if they fire up as I suspect they 
will.  Then check the fuse (replace the entire box if they are all over 
10 years old)  then follow with the switch to see that the harness is 
fully seated.  If still no go on the highway horns, run an ohm meter 
across the switch to confirm it's good.  That will leave you with a 
break in the wiring harness if the switch proves good.

Oil level switch is on the oil pan to driver's side.  It's probably in 
need of replacement or the harness is suspect.  When replacing be sure 
to get both the sender plug and sender to pan seals.

Headlight right.  Check the connector to the headlamp itself with 12vdc 
if no go, take a volt meter to the headlamp harness and check for 12vdc 
with lamp switch on.  If this fails, inspect the harness and fuse.

Sender could be corroded.  It's atop the fuel tank and accessed behind 
rear driver's seat cut-out.  Need a big spanner wrench to remove.  It 
can be cleaned if you are really careful.  The nickel chrome leads need 
to be lightly sanded or just replace the sender and tank seal.

Good luck.

Dick

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> Hi all

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> I have a few things going on with my1988 560 sec maybe yous guys can 

> help me one more time.

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> 1. Idling high 1200 rpms I bought a used Idle speed valve but I think 

> it`s no good the old one that was on the car was from a BMW a new is 

> on its way (new used that is) do you think that may fix it? 

>

> 2. the horns are not working at all but when fanfare horn control 

> switch is on there is a very soft horn (that no one but me can hear)

>

> 3.The oil light is on but oil is fine.

>

> 4. Head lights -- I have the head lights working now but no right ( 

> and I have no idea ) euro headlights I got new plugs

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> 5. gas gauge not working right will not go below ½ tank is that the 

> sender? And R --light on all the time

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>   Thanks  all Kelly

>

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