I was just wanting somemore direction if anyone has some to try and fix my family members horn on his 1990 560SEC W126. I know the horns themselves work because I can put juice to them and they will blow. I figured it was the connection plate on the steering wheel, so I took one of his other W126 that was working but this didn't fix it either. I have also changed the module or relay that controls the alarm system in the passenger side floorboard area. I have checked all fuses and I really don't know where to go next. He said the alarm went haywire before this horn problem happened and I unplugged it, then he needed the horn one day and that is how we found out it doesn't work. As stated above I then change out that module, didn't fix it. Does these cars have a relay for the horn? Or anything else that could make the horns not get juice? Any insight would be greatly appreciated.

Does your car have the fanfare horns? .... the switch in the center console tends to get unplugged due to the harness being so short.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Doesn't look like much is there. Did you check the fuse?

Attached Files

3664.pdf (17.8 KB, 322 views)

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

What is that fanfare all about?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

What switch in the center console are you referring to?

the relay should be on the passenger side inner fender. also check to see if any juice is flowing to the relay. good luck