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The Mercedes-Benz W126 is a series of S-Class automobiles manufactured by Mercedes-Benz between 1979 and 1992. Premiering in September 1979 as the successor to the W116 line, the W126 was the second generation to officially bear that prestigious designation, an abbreviation for the German Sonderklasse or "special class." The W126 was initially offered with straight-six, V8, and a turbocharged diesel engine for the sedan. A C126 2-door coupé versions was introduced in September 1981.

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Is there a way to test if relays are bad?

How to test if my relays are bad?

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what relays?

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relays are essentially an electronic switch, when a voltage is applied to the coil it will close the switch when it is removed it will open (normally open relay), without going into too much detail the type of relay youre talking about would be set up to cut its own power supply to make the light flash, as such if it is working you should be able to hear it clicking in and out, if it inst (with you’re multi meter in dc mode because its being fed by a battery) check there is power getting to it, if there is then you would expect continuity (complete circuit) through one side when the coil is energised and not the other and vice versa when it is de energised - but if you’re not familiar with electrics i would just listen for the clicking, if its not clicking its either not getting power for some reason or its stuck/burned

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Hi @eddief ,

Even hearing it click isn't foolproof as the relay contacts could have burnt out or even fused together and all you're hearing is the armature operating.

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