|
|
|
#1
|
|||
|
|||
OK, since there's so much talk about the different relays on board our wonderful cars, and also talk about "wiring in a relay" when using higher wattage headlamp bulbs, I need to ask the obvious question...
What function does a relay serve and how does it work? I'll take a ration of muck from the list if it means getting this question answered. Thanks folks, ------------------ Jay Yambrovich 1989 300 E 1992 190-E 2.3 |
#2
|
||||
|
||||
Hi:
A relay is basically a heavy duty switch designed to handle more current than, say, your headlight switch. If I understand the wiring correctly, on many cars relatively minimum guage wire runs to the headlight switch, then to the headlights. This restricts the amount of current that gets to the lights. With a relay, heavy guage wire runs to the relay, then to the headlights. The light guage wire that used to run from the switch to the headlights now runs to the relay, and turns it on as a low current device, and the relay turns on the headlights as a high current device. This allows the headlights to draw the maximum amount of power without cooking the wiring or headlight switch. There is a great discussion of relays and diagrams for wiring at http://lighting.mbz.org/tech/how_to/relays/ Hope this helps ------------------ JCE 87 300E, 65k miles Smoke Silver |
Bookmarks |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
General Question about 190E's | Mino Erhan | Tech Help | 1 | 02-10-2003 12:36 PM |
Question on the emergency shut off... don't worry NOT another vacuum question! | 190D22 | Diesel Discussion | 4 | 11-15-2002 10:47 PM |
General question - O-ring size selection | gdaley | Tech Help | 0 | 10-31-2002 01:24 PM |
ONE last question and my A/C problem is solved !!! | Ron Brooks | Tech Help | 3 | 09-21-2002 05:24 PM |
General question about cold starting. | hgupta | Vintage Mercedes Forum | 4 | 05-17-2001 08:55 PM |