Eberspacher heater cable dont know where it goes.

Dedicated to the memory and knowledge shared by Jim Mettler - All things relating to the flow of electrons in a Pinz.
Post Reply
boeing7873
Argentina
Posts: 149
Joined: Sun Dec 21, 2008 10:50 am
Location: Atlanta
Contact:

Eberspacher heater cable dont know where it goes.

Post by boeing7873 » Tue Jun 13, 2017 2:35 pm

Anyone care to check on their truck where on the eberspacher heater this brown cable goes? Looking at the three relays screwed to the truck frame, this cable comes from the RIGHT side of the CENTER relay and goes... Where?
I do have the wiring dont have one for the eberspacher to correlate all cables.
Thank you,
Jeronimo
Jerome
CRJ Driver

User avatar
pcolette
United States of America
Posts: 1408
Joined: Sun Dec 10, 2006 7:38 pm
Location: Southwest Wisconsin

Re: Eberspacher heater cable dont know where it goes.

Post by pcolette » Tue Jun 13, 2017 4:44 pm

Which model do you have? I may have an install guide with wiring instructions for it.
Paul C.
_________
'73 Swiss 710M
'89 Puch 230GE
2002 MB G500 (For Sale)

boeing7873
Argentina
Posts: 149
Joined: Sun Dec 21, 2008 10:50 am
Location: Atlanta
Contact:

Re: Eberspacher heater cable dont know where it goes.

Post by boeing7873 » Tue Jun 20, 2017 9:34 pm

Hello Paul,
It is a BN4, installed in my 1975 710K, right behind the seat.
It has three relays installed right behind the heater.
Thank you,
Jeronimo
Jerome
CRJ Driver

whitesik
United States of America
Posts: 111
Joined: Thu Apr 02, 2015 2:11 pm
Location: Indiana, U.S.A.

Re: Eberspacher heater cable dont know where it goes.

Post by whitesik » Tue Jun 20, 2017 11:07 pm

75 Swiss 710K
Not so new owner but still a novice

User avatar
pcolette
United States of America
Posts: 1408
Joined: Sun Dec 10, 2006 7:38 pm
Location: Southwest Wisconsin

Re: Eberspacher heater cable dont know where it goes.

Post by pcolette » Tue Jun 20, 2017 11:09 pm

Here are links to a couple of manuals I have on the BN4. Hopefully one will help you out.

https://www.dropbox.com/s/tl31xbs1tncr3 ... d.pdf?dl=0

https://www.dropbox.com/s/w4kuk7ye2rh84 ... d.pdf?dl=0

Paul
Paul C.
_________
'73 Swiss 710M
'89 Puch 230GE
2002 MB G500 (For Sale)

boeing7873
Argentina
Posts: 149
Joined: Sun Dec 21, 2008 10:50 am
Location: Atlanta
Contact:

Re: Eberspacher heater cable dont know where it goes.

Post by boeing7873 » Sat Jun 24, 2017 11:25 pm

Many thanks for the replies! quite useful info. I should print these and put them in my truck library. But still can't figure it out. Why are there 3 relays in the back of the heater, when all heater references point to only one? Why the Pinz has other two relays?
Jerome
CRJ Driver

boeing7873
Argentina
Posts: 149
Joined: Sun Dec 21, 2008 10:50 am
Location: Atlanta
Contact:

Re: Eberspacher heater cable dont know where it goes.

Post by boeing7873 » Sat Sep 15, 2018 9:45 pm

So... getting closer. Found in a german forum a wiring diagram for the BN4 installation in our Pinzgauers. Still this apparently describes the installation for a specific model that I recognize by the type of Hardy pump. The one in this diagram is for a pump with + and - connectors. The one I have installed is for a pump with only a + connector, the ground is obviously taken from the core mounted to the chassis.
See the different installations pre and post 69. I believe this 710K wiring diagram is for the post 69 and I have a pre 69 in the truck. Just a guess and it does not make sense since my truck is 75.

I bought a new Hardi pump, with + and -, and replaced the original that only had a + connector, and it wont work. As soon as I turn the heater on, the over temp or no flame protector cuts all power and the fail light comes on. Only time resets the system. Can't understand why.
Attachments
BN4 Wiring 710k.jpg
BN4 Wiring 710k.jpg (124.79 KiB) Viewed 276 times
2017.JPG
2017.JPG (109.39 KiB) Viewed 276 times
Jerome
CRJ Driver

Post Reply