High Beams don't work
Thread Starter
Newbie
Joined: Jun 2004
Posts: 10
Likes: 0
From: Weatherford, TX
94 E320 4 Sedan
High Beams don't work
Okay guys ... and gals ... gets into the 320 the other night and heads off into town, get onto the open road and flick the switch from low to high beam and nothing ... flick back to low beam and all is well ... back to high and again nothing. All other lights on the car are working normally, inside and outside, but both high beams and the high beam indicator are dead ... checked bulbs & connectors ... all okay, broke open the manual and traced the wiring diagram until I was cross-eyed 
found that they run from fuses 15 &16 in F1, raced out checked and cleaned fuses they are both fine, according to the manual it looks like the wires go from the fuse box into a connector under the dash and into the combo switch on the column.
Anyone else had this problem? Ideas or thoughts on what to look for before ripping the dash out and attacking the steering column? Is there another power source I am missing?
TIA
Kevin
found that they run from fuses 15 &16 in F1, raced out checked and cleaned fuses they are both fine, according to the manual it looks like the wires go from the fuse box into a connector under the dash and into the combo switch on the column. Anyone else had this problem? Ideas or thoughts on what to look for before ripping the dash out and attacking the steering column? Is there another power source I am missing?
TIA
Kevin
Super Member
Joined: Dec 2002
Posts: 882
Likes: 2
From: Sherman Oaks
2004 C240, 2015 GL350 Bluetec
I would try changing the fuses and bulbs first, if that does nto work, perhaps the connectors ont he headlights or the wiring in the headlights is somehow disconnected.
If all else fails, there may be a relay that is used for the high beams that is bad, or the combination switch is bad.
Start simple first, then go into more if that does nto resolve it. Seems strange to me that both bulbs would go bad. did you test them.?
AshMan
If all else fails, there may be a relay that is used for the high beams that is bad, or the combination switch is bad.
Start simple first, then go into more if that does nto resolve it. Seems strange to me that both bulbs would go bad. did you test them.?
AshMan
Thread Starter
Newbie
Joined: Jun 2004
Posts: 10
Likes: 0
From: Weatherford, TX
94 E320 4 Sedan
Okay, both bulbs have been tested and both work fine on high and low beam when connected to a battery, pulled the headlamp conectors, they are clean and dry, pushed them on and off a few times to make good contact. Fuses 15 & 16 are both 8 amp rating so swapped them out with some new 8 amp so they also are good ... still no high beams.
So unless there is a relay, or another fuse I am missing or cant see on the wiring diagram, it looks to be the combo switch on the column ... are these hard to R&R, any special tools or instruction needed?
Thanks
Kevin
So unless there is a relay, or another fuse I am missing or cant see on the wiring diagram, it looks to be the combo switch on the column ... are these hard to R&R, any special tools or instruction needed?
Thanks
Kevin
Super Member
Joined: Apr 2005
Posts: 800
Likes: 0
From: Northern Cali
W124
Originally Posted by 94E320
So unless there is a relay, or another fuse I am missing or cant see on the wiring diagram, it looks to be the combo switch on the column ... are these hard to R&R, any special tools or instruction needed?
Thanks
Kevin
Thanks
Kevin
Super Member
Joined: Dec 2002
Posts: 882
Likes: 2
From: Sherman Oaks
2004 C240, 2015 GL350 Bluetec
have you used a test light to ensure there is voltage going to the connector on the headlight from the combination switch? If there is voltage there when the combination switch is activated, then have you check to make sure the wiring inside the headlight has voltage and if so is there voltage going to the bulb in this scenario.
I would definately get a test light and or multimeter to test for voltage if you havent done so already.
AshMan
I would definately get a test light and or multimeter to test for voltage if you havent done so already.
AshMan
Newbie
Joined: Aug 2004
Posts: 19
Likes: 0
Sorry
Sorry to bring up a thread 3 years old, but I have the exact same problem. What was the end result? I have electrical issues right now myself and was wondering if changing the combination switch made the high beams work again?
Super Member
Joined: May 2003
Posts: 696
Likes: 4
From: Motor City
95 E320 Cabriolet, 108K
Been there. My problem is intermittent and is in the combimation switch. I find that vigorously exercising the combination switch (slapping it back and forth) can restore the function for a while.
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Super Member
Joined: Jan 2007
Posts: 710
Likes: 2
From: Beverly Hills, CA
03' CL55 AMG
I lost my high beams too, first the manual pullback on the stock went out but i could still turn them on in the locked position but now they don't work at all, i guess i is the combo switch on mine as well, i just hope i do not loose my wiper control as it has been raining here big time lately
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