My '78 240D has an even more simplified version of this in that the relay
powers the glows directly (old series type plugs).
I actually spent some time eyeballing my '83 240D last night for what I'd need
to pull to make the newer type relay work. I'm tired of holding the button for
60+ seconds now that its getting cooler. I want new type plugs and an automatic
relay.
-Curt
Date: Tue, 02 Nov 2010 21:37:31 -0400
From: David & Kristin Gilmore <dandkgilm...@frontier.com>
To: Mercedes Discussion List <mercedes@okiebenz.com>
Subject: [MBZ] Cheap preglow relay fix
Message-ID:
<20101103013731.712a610f...@relay02.roch.ny.frontiernet.net>
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
> Recently when I went to start my 83 SD I had no dash glow
> light and the engine wouldn't fire. I traced the problem to the
> preglow relay (black plastic box about 3"X3"X"2" on the fender
> behind driver's side headlight). There was voltage accross the 80
> amp strip fuse but nothing was getting to the glow plugs.
I took off the relay, removed the 4 screws at its edges and
slid the contents out. A solenoid and a circuit board which looked
mostly OK except for two little canisters that had leaked out beige
goo. Brother Rusty prices this relay at $189.
When I googled pregow relay bypass I found some have
replaced it with a fender mounted starter relay of the Ford type
actuated by momentary contact button switch. The attached pictures
show my adaptation of this approach - I left the original relay there
to use the wiring connecters and 80 amp fuse. (Before I put it back
together I rigged it so it would always be on.)
$14.99 for the solenoid, $4.99 for the switch, both from
Autozone. You lose the dash light function. But it is easy to start
counting seconds when you hear that SNACK sound.
Dave Gilmore, Cameron WV
_______________________________________
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
