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Old 02-03-2011, 02:50 PM
Willie B's Avatar
Willie B
Join Date: Oct 2009
Location: Lake Oroville & North Hollywood California
Posts: 50
...'87 300D Ignitnition S/W getting Hot???...

...As I was having AC/Heat problems,...I replaced the ignition s/w after testing all the other elec. items on that circuit... ...The AC worked for a day,...then back to the same old issue,...blowing #7 fuse... ...Now I have noticed that the new from the dealer s/w is quit hot to the touch, is the key when I remove it... ...Is the ig. s/w getting hot normal???...or is it possible that the mechanic could have,...not gotten the plug attached properly at the back of the s/w???...
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Old 02-03-2011, 03:15 PM
Join Date: Jan 2006
Location: Pennsylvania
Posts: 16
That sounds scary to me, unless he left an air duct loose, and the heater is heating the back of the dash.

If this is not the case, I'd have the car towed back to him.

I had a problem with blowing fuses because the fan bearings were dry and dragging. That is easy to check with an ammeter.
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Old 02-03-2011, 03:47 PM
TnBob's Avatar
Registered User
Join Date: Dec 2009
Location: Shelbyville, Tn
Posts: 1,907
Hot key = very large current load which = potential large problem.
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."
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