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Low Beam Check Relay

4K views 2 replies 2 participants last post by  Bear 
#1 ·
I have a 1990 325ic and the low beams do not work (they work with the high beams) I understand this is a multi-filament lamp and the fuses are good so I, again (did this six months ago) suspect the low beam relay. However, there is a low beam check relay as well, and can someone tell me what this does.
 
#2 ·
No, stock head lamps are not multi-filament. The low beam check relay activates the warning lamp system above the rear view mirror (if equipped). Your problem sounds like a bad low beam relay or a fault in your combination switch. Unless your head lamps are aftermarket, then you could have other electrical issues.
 
#3 ·
Check Relay

Thank you. I was under the impression that the low beams had dual filiments so they could work as a low beam or in conjunction with the high beams. You may have no low beam but turn on the high beams and the lows work along with the high beams.
 
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