W116 blower motor series resistor

More threads by Jimb

Jimb

Distinguished
Messages
137
Points
24
Location
Kanahooka
Hello from Jimb sorry to bother you. Just obtained this 1974 W116 280SE on Easter Monday. So here am I on your forum .It is a nice car but has some electrical issues .My background is electrical / electronics so I am hoping I can cope with it's problems. Can someone please tell me where the blower motor series resistor is and how do I remove it for repair. Also how do I remove the blower motor for repair. The problem is this ,I replaced missing fuse 8 amp fuse 3. Supposing I switched fan speed to position 1 or 2 .Speed is actually not relevant .It runs for a short time then goes into full speed by itself and cannot be switched off unless I turn the ignition of. If the ignition is turned on again fuse 3 blows because the fan is drawing full current on high speed. If I disconnect the battery the system resets itself. You can then reselect speed one or 2 and it again after about 10 seconds switches itself back to full speed. I had a spare selector switch which I replaced and it does the same thing.I also removed electrical connections from thermostat. I suspect maybe 2 faults one is the series resistor and 2 the fan motor may be drawing a bit too much current. I measured the current at 7.6 amps on full speed which is too close to the rating of fuse 3 which is rated at 8 amps .Any help will be greatly appreciated.kind regards.Jimb
 
OP
J

Jimb

Distinguished
Messages
137
Points
24
Location
Kanahooka
Hello Bryce.
That is very helpfull .
I am hoping the series resistors will be close by.
Regards Jim.
 
Similar threads
Thread starter Title Forum Replies Date
zej W116 article on Classic and Sports Car this month Mercedes W116 2
Michel Difference Between W116 and W126 Technical Information 15
W126GUYSYDNEY My Love for the W116 1979 450SE Silver green Mercedes W116 4
W126GUYSYDNEY Our Newly Acquired W116 Mercedes W116 9
c107 For Sale 1979 280SE W116 Gumtree/eBay/Facebook Listings 15
motec 6.9 W116 with M156 engine Mercedes W116 12
Stephen Nemeth Source for an R107 or W116 clutch pedal Mechanicals 7
c107 W116's sold here in Australia Mercedes W116 10
c107 Video Series on the W116 Mercedes W116 8
c107 W116 Colour options Mercedes W116 3
K How and where to obtain service history for W116 Mercedes W116 7
Styria W116 production - Sindelfingen Mercedes W116 1
O W116 D jet? Mercedes W116 12
6.9forever South African W116 YT videos: Galimoto Media Mercedes W116 3
Oversize W116 Full Body Kit Spotto Exteriors and Body Repairs 8
motec 6.9 Rebuilding W116 6.9 Struts Mercedes W116 7
Oversize Velour Recaros in a W116 Interiors 4
Styria R107 - W116 - W109 Parts Gumtree/eBay/Facebook Listings 7
c107 W116 parts stash in Sydney on ebay Gumtree/eBay/Facebook Listings 1
J Radio support cradel 1974 W116 280SE. Articles 5
Michel Wanted Steering Wheel for W116 Gumtree/eBay/Facebook Listings 11
J Bosch D-Jetronic Fuel injection 1974 280 SE W116 Articles 17
J Removing chrome grill from water box housing W116 Mercedes W116 5
Michel For Sale -- Chrome Wheels suit W116 Gumtree/eBay/Facebook Listings 2
Michel For Sale: W116 Dashes Gumtree/eBay/Facebook Listings 3
Michel Off the beaten track in a W116 350SE Mercedes W116 2
Oversize Bed time for the W116 obsessed Mercedes W116 9
motec 6.9 W116 just entered for Summernats Mercedes W116 3
braminator123 Malcolm Fraser - Prime Ministerial W116 Mercedes W116 6
Sluggish W116 280s engine options Articles 6
Oversize W116 Production Video Mercedes W116 2
Oversize Recent W116 Ads & Interest Gumtree/eBay/Facebook Listings 0
Oversize Ron Barassi and the W116 Articles 6
Oversize Some W116 Screensavers Mercedes W116 15
Oversize Beautiful W116 timber trim Interiors 21
6.9forever Original Fuchs v. replica 14" alloy wheels for W116 and R/C107 Technical Information 1
Michel Mercedes W116 One-Tonner! Gumtree/eBay/Facebook Listings 4
c107 W116 280SEL in the shire Gumtree/eBay/Facebook Listings 8
c107 300sd w116 Mercedes W116 4
J W116 Sheet Metal Thickness Exteriors and Body Repairs 8
c107 W116 charity bash car Gumtree/eBay/Facebook Listings 0
Oversize W140 dash in a W116 Interiors 4
Oversize 4x4 W116 Gumtree/eBay/Facebook Listings 10
motec 6.9 W116 Convertible Mercedes W116 12
B FS: 300SD W116 1978 in AUSTRALIA Gumtree/eBay/Facebook Listings 0
Andrew280SEL What is it that you love about the W116 (or alternative model)? Mercedes W116 9
6.9forever Classic value - the W116 Mercedes W116 21
260ebenz Diesel W116 wins Sebring Mercedes W116 0
motec 6.9 W116 project bites the dust N.S.W Gumtree/eBay/Facebook Listings 14
Oversize W116 Instrument Clusters Interiors 21

Similar threads

Top