They did, but the wiring is still marginal at best. No relays in the lighting circuits that I know of.
Feeding off the battery is fine, and electrically no different than if you went to the alternator output terminal. In the earlier models that had the battery up front, I always went to the positive terminal of the battery. On Jan 11, 2014, at 5:50 PM, Larry T wrote: > You wrote: > *" Typically an new, heavy (large) wire and a new fuse (or** > **circuit breaker) is connected at the battery. This is run to a** > **relay mounted near the headlight. The "output" of the relay goes** > **to the headlight. The original headlight wiring (going through the** > **headlight switch) no longer directly drives the headlight - but the** > **relay instead. ** > ** > **Since an appropriate relay will draw a lot less current than the** > **headlight, the original switch and wiring are really loafing. The** > **heavy work of driving the headlight now goes through the new fuse,** > **new wire, and new relay. The whole system functions as original** > **since the original switches control the relay which is controlling** > **the headlight."* > ____________________________________________________________ > The 911 has a good layout for this addition - the headlights and fuse panel > are near each other as is the battery. There are also separate circuits for > the Left Low, Left High, Right Low and Right high beams. The relays I have > and larger gauge wire should help with most suggestions. I plan to hook the > relays into the positive post of the battery which gets the feed from the > alternator - wiring directly into the alternator would be difficult. I've > always been told the light switch on the 911 is a weak link. > > My primary question about adding relays to the W124 was only "kinda" answered. > > I'll check the wiring diagrams to see if I find any relays in the lighting > circuit. Perhaps the MB engineers used a more robust switch than Porsche? ;-) > > Thanks to you and all others for their well written comments... > > Sincerely, > Larry > > On 1/8/2014 11:38 PM, Fmiser wrote: >> Typically an new, heavy (large) wire and a new fuse (or >> circuit breaker) is connected at the battery. This is run to a >> relay mounted near the headlight. The "output" of the relay goes >> to the headlight. The original headlight wiring (going through the >> headlight switch) no longer directly drives the headlight - but the >> relay instead. >> >> Since an appropriate relay will draw a lot less current than the >> headlight, the original switch and wiring are really loafing. The >> heavy work of driving the headlight now goes through the new fuse, >> new wire, and new relay. The whole system functions as original >> since the original switches control the relay which is controlling >> the headlight. > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
