No starter relay needed?

[Mickmorris]

Any idea what amperage ?

20 amp inline on positive lead from EHC to battery. 30 amp to VR/ battery positive

 

[Jimmyb]

Will do!!! Thanks !

 

[Mickmorris]

Will do!!! Thanks !

In this picture you can see the fuse close up by the top of the battery is the inline fuse on the positive EHC lead. Down lower in the battery box is the connector for the VR its a single post with a 30 amp fuse coming out to the battery. The fuse is ziptied to the old ignition module mount. You can just see it below it

 

[Jimmyb]

What gauge wire did you go with ?

 

[Savage 1]

If you look at the wiring diagram for that bike, both the starter relay and CB are there. The wiring diagram displays both. You can figure well over 100 amp draw on that starter on that engine.

In fact, the CB on the diagram displays 40 Amp for 2008.

 

[Jimmyb]

Yes I think the stock ones from big dog are 40 amp

 

[Savage 1]

Yes I think the stock ones from big dog are 40 amp

The manual that I posted states 160-180 amps. Over 200 is a problem. You can determine wire gauge based on current draw Boss.

 

[Mickmorris]

What gauge wire did you go with ?

If you go to bigdogpartskingpin.com and put in the information of your motorcycle. Select electrical from the menu for your bike. You will find the VR protection kit. It is like $20 but will save you from ever cooking your EHC again if the stator or VR fail.

 

[Mickmorris]

If you look at the wiring diagram for that bike, both the starter relay and CB are there. The wiring diagram displays both. You can figure well over 100 amp draw on that starter on that engine.

In fact, the CB on the diagram displays 40 Amp for 2008.

40 or 30 either is going do the business.

 

[Jimmyb]

Yes I saw that. I ordered a 30 and a 20 amp from Amazon. Be here tomorrow. I hope to wrap all this is and cross your fingers for me that all the connections are good the first time routing through the back bone is NO joke. I’m using thermal, tape and electrical tape over top of any areas where the wires will vibrate and rub.

 

[Mickmorris]

Yes I think the stock ones from big dog are 40 amp

40 is fine

 

[Mickmorris]

Yes I saw that. I ordered a 30 and a 20 amp from Amazon. Be here tomorrow. I hope to wrap all this is and cross your fingers for me that all the connections are good the first time routing through the back bone is NO joke. I’m using thermal, tape and electrical tape over top of any areas where the wires will vibrate and rub.

 

[Jersey Big Mike]

Yes I saw that. I ordered a 30 and a 20 amp from Amazon. Be here tomorrow. I hope to wrap all this is and cross your fingers for me that all the connections are good the first time routing through the back bone is NO joke. I’m using thermal, tape and electrical tape over top of any areas where the wires will vibrate and rub.

Use this instead -- better protection. https://www.amazon.com/Braided-Mana...&hvlocphy=&hvtargid=pla-4584413755313521&th=1

get whatever size or sizes you need.

 

[Jwooky]

Thanks for saving us Jwooky!

Just for my own knowledge going forward......what stops the back EMF created by the solenoid from traveling back to the ECM?

I ran into this problem on the good ole Shovel heads back in the day. Any coil or inductor causes this issue when the current is cut.

Is there an inline diode or is it built into the driver?

Thanks Boss

There is nothing to stop the back current per se, you just have to size the drivers etc to tolerate it.

 

[Savage 1]

There is nothing to stop the back current per se, you just have to size the drivers etc to tolerate it.

I suppose the safest idea is to put a diode directly on the solenoid. That was how we rectified the problem on the Shovel.

 

[Jersey Big Mike]

There is nothing to stop the back current per se, you just have to size the drivers etc to tolerate it.

For the starter circuit there is protection built into the EHC according to the schematic in the manual.
If you want to be extra safe get a relay with protection built in -- harley uses them in older softails.
if you need to know the part no let me know and I can find it pretty quick.

 

[Savage 1]

For the starter circuit there is protection built into the EHC according to the schematic in the manual.
If you want to be extra safe get a relay with protection built in -- harley uses them in older softails.
if you need to know the part no let me know and I can find it pretty quick.

Thanks, appreciate it. No need to post part number Bud.
Do you have a copy of the EHC schematic? I haven't seen that.

 

[Jersey Big Mike]

Thanks, appreciate it. No need to post part number Bud.
Do you have a copy of the EHC schematic? I haven't seen that.

No, only what's in the manual.

 

[Rottweiler]

Not sure what EHC you installed. Here is a schematic of Axel's

EHC replacement

...Just an other story: I got my Ridgeback 3 days ago :) I already kicked off the original EHC (It was not very complicated as the screws were hanging at the holder and the box was separated alreday from the screws) and installed my EHC. Nice bike and more comfortable to ride compare to my other...

www.bigdogbiker.com

 

[Jimmyb]

I did the RIP gen 1. Finishes it today. Started right up. Took a few rides. Unbelievable how easy it starts now. So far so good. Adding some fused protection tomorrow for the EHC