No starter relay needed?
- Thread starter Jimmyb
- Start date
This is verification. I can't overemphasize the importance of circuit protection. If you read through the posts, you can see where mistakes were made and the EHC failed.
Good information sir. The starter circuit and the VR are important. The protection of the EHC is paramount.
Jimmy is on it, he was asking and understands the importance of wire gauge. Originally, Big Dog thought the problem was the EHC, however, the wire gauge and circuit protection was also a problem. I had to completely rewire my 2004 Bulldog, It was a mess from the factory. I think Axel figured that out as well.
Last edited:
Did you go direct from the battery for both the VR and the EHC? Neither from the CB ?
Jwooky
Well-Known Member
Yep. Sure they have a similar device on the board.
Jimmy, I would contact Axel direct. I also would ensure the circuit protection is in place for starter, VR, and EHC. I read in an earlier post where Dog owners sent EHC back to Axel and the problem was within the circuit protection on the bike. I do see resistors in the Axel's schematic, however, I think they are to control current on the enclosed PCB. (Not protection from other circuits) At this point, we have no idea what is inside of the GEN 1 RIP EHC. Therefore, I would be concerned how it would handle a power surge from a faulty circuit or flyback from solenoid. Just trying to close up loop holes that could lead to a burnt circuit or EHC.
Well right now what I’m gonna do. Is fuse the EHC and fuse the VR. 20 and 30 amp. The directions with the RIP kit has the power to the EHC coming from after the breaker. I can only assume that they planned this correctly as far as voltage concerns. There is NO starter relay with this system. As far as diodes go , I have no idea how to figure those equations. Not even sure how much draw the EHC needs to work. I do know the CB is a 40amp. The other EHC that was in here before was a birds nest mess. Not sure what system it was. Obviously not a good one. It died for whatever reason. If anyone knows how to figure the correct amp fuse for the VR and the EHC from Big Dog please chime in. Otherwise I’m going to at least try this for added protection.
I see on some of the original schematics it shows the EHC connects direst to the battery. On the RIP kit EHC it had the power labeled to CB. I did install a 20 amp fuse between the two. I hope this will help in case of an issue. Not exactly sure if a 20 is correct ? Could maybe even go lower? I really don’t know.
That is exactly the correct set up. Circuit breaker is basically eliminated from the setup and the 30 amp fuse from VR to battery is the replacement for it. As I mentioned earlier your EHC positive lead with 20amp fuse directly to positive post on battery. DO NOT put in the circuit with the VR. VR & 30amp fuse directly to positive post on battery.
So ,,, NO circuit breaker! ? Perfect timing , I was just wondering about this elimination and was getting ready to head outside to finish all
This up
Mikeinjersey
Well-Known Member
The original 40 amp CB connected to the + terminal of the battery can remain. All you need to do is add a 20 amp fuse between the + terminal and the EHC. The 40 amp CB protects the Battery from a short or over-current from the VR. The 20 amp fuse protects the EHC from a shorted Battery. If you choose to replace the CB with a fuse it will accomplish the same protection. I don't see the need. The stock CB is re-settable.
Last edited:
Well as long as you put the fuse in leave the CB. It won’t hurt anything certainly. Just one less piece in the system from my perspective. I took it out. Redundancy.
That’s the problem with the CB is it’s resettable. Most people just push the reset and don’t look to see what caused it to trip. If a fuse blows. You are going to start looking for a problem straight away in your charging system.
No need for it with the 30 amp fuse truthfully