Hella Relay replacement ?

fishEH

Well-known member
Jan 26, 2009
6,271
5
Lake Villa, IL
The blue Hella fused relay that came with my 4000's is shot. Totall corroded from salt, etc. This one:


Can I replace it with a standard Yellow Siemens Rover relay? I have about 6 spares so I figured it would be nice to make things a little more universal.

The power for the lights is already drawn from a fused Blue Sea terminal block so I'm not worried about losing the fused relay. Or should I be? I'm not great with 12V electrical so help me out. Or can I just grab a relay from the Auto Parts store that would work?
 

fishEH

Well-known member
Jan 26, 2009
6,271
5
Lake Villa, IL
tscottg said:
You can use any bosch style single pole/double throw relay

They are $5-10 at your local auto parts store

at Advance the BWD part number is MR78 but yes the relay you have SHOULD work
as long as the schematic looks like this one

http://www.ebay.com/itm/24V-20-AMP-5-PIN-RELAY-REPLACE-BOSCH-0-332-209-203-/140296447207#ht_4126wt_922
Hmmm, the one you linked has 5 spades and lists an "87a". The Hella I was using only had 4 spades and no "87a" terminal?

This is the schematic on the Yellow Rover Relay:
 

antichrist

Well-known member
Sep 7, 2004
8,208
0
63
Atlanta, GA
The hella relay has the internal wiring diagram on the side. Any relay that matches it, and has the same or higher ampacity, will work.