KaptinAmerika
Guru
He only simulated repeated start attempts for up to 10 seconds at a time so I wouldn't really call that a thorough test.
Be interesting to see where this goes.
EHC replacement
- Thread starter Axel
- Start date
Be interesting to see where this goes.
BWG56
Guru
Yes it does have the 30Amp fuse,
KaptinAmerika
Guru
Rottweiler
Well-Known Member
Slick117
Active Member
So, I installed Axel's ehc this morning, and went out for a two hour ride after. I am absolutely thrilled with what he has come up with. Everything works just axactly as it should. I really pushed things pretty hard and did not have one single glitch........I repeatedly started the bike with no problems whatsoever......all of my indicators worked just exactly as they should with no problems. I really think he and his team are onto something here and I think it will be a HUGE benefit to all of us. It's going to be great to have an alternative to the issues so many have had with their electrical systems.
Rottweiler
Well-Known Member
Thanks James,
Sounds great I am glad it got you back on the road.
Let us know if anything changes. 
Axel
Active Member
Hi Slick117
Thanks for the info. it is nice to read, that (almost) everything is fine. The lite dimly indicators might happen when the software option "Low Light" is activated or it just depends of the different wiring what I made for the Europen market. This affect the pins A27 and A28 for the rear side indicators what are wired in my EHC to ground instead of the turn lights. A12 and A13 changed to brake light / rear light combination and A2 and A9 changed to indicators left/right. This is in the same way like the rear light connections at the 2004 models. Just change the wires of the both rear lights in this way and everything will work if the software option "Low Light Off" will not work. I hope to borrow an US model rear light from the local dealer here next week what will allow me to play with it and find out a solution. The next option could be an EHC only for the US market, what will have just a bit different wiring on the rear lights. I attach the manual of my D-Box, what is identical from the software. This will help to change the settings. The pdf is from my Netherland distributor. He makes a much better translation compare to my lousy english...
By the way, I have put 2 plastic spacers between the board and the box, what will lift the board and connectors a bit in the box. I attach a photo:
About the starter: The maximum current is 30 Ampere and the current limitation of the high side switch inside of the EHC will switch off the output if higher currents will flow. The high side switch inside of the EHC will switch on again when the short circuit is eleminated. However, the high side switch can heat up to 140 degree Celsius in a very short time before limiting the current. This could result in that the box is not waterprooved anymore after the short circuit due to the small gaps. This is often a problem in electronic boxes with high side switches. We made some experiments with different potting compounds and found one (Odopal) what is (...a bit) more flexible compare to other compounds. However, your box will work for many years without problems if you don´t intend to make a short circuit
The 2004 EHC will be ready in a few weeks if the boards will pass the final test next week.
Does somebody have a schematic of a 2003 model? Is it similar to the 2004 or different? I have an inquire for a 2003 EHC and just hope that the 2004 EHC will work as well, if ready...
All the best!
Axel
Thanks for the info. it is nice to read, that (almost) everything is fine. The lite dimly indicators might happen when the software option "Low Light" is activated or it just depends of the different wiring what I made for the Europen market. This affect the pins A27 and A28 for the rear side indicators what are wired in my EHC to ground instead of the turn lights. A12 and A13 changed to brake light / rear light combination and A2 and A9 changed to indicators left/right. This is in the same way like the rear light connections at the 2004 models. Just change the wires of the both rear lights in this way and everything will work if the software option "Low Light Off" will not work. I hope to borrow an US model rear light from the local dealer here next week what will allow me to play with it and find out a solution. The next option could be an EHC only for the US market, what will have just a bit different wiring on the rear lights. I attach the manual of my D-Box, what is identical from the software. This will help to change the settings. The pdf is from my Netherland distributor. He makes a much better translation compare to my lousy english...
By the way, I have put 2 plastic spacers between the board and the box, what will lift the board and connectors a bit in the box. I attach a photo:
About the starter: The maximum current is 30 Ampere and the current limitation of the high side switch inside of the EHC will switch off the output if higher currents will flow. The high side switch inside of the EHC will switch on again when the short circuit is eleminated. However, the high side switch can heat up to 140 degree Celsius in a very short time before limiting the current. This could result in that the box is not waterprooved anymore after the short circuit due to the small gaps. This is often a problem in electronic boxes with high side switches. We made some experiments with different potting compounds and found one (Odopal) what is (...a bit) more flexible compare to other compounds. However, your box will work for many years without problems if you don´t intend to make a short circuit
The 2004 EHC will be ready in a few weeks if the boards will pass the final test next week.
Does somebody have a schematic of a 2003 model? Is it similar to the 2004 or different? I have an inquire for a 2003 EHC and just hope that the 2004 EHC will work as well, if ready...
All the best!
Axel
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Slick117
Active Member
Kerry, it was, and is, literally a 10 minute plug and play operation. The stock harness and connectors match right up, with nothing to do, other than switch out the ehc and go riding.Thanks for the feedback James, this is definitely good news for Big Dog owners that have not made the switch yet to one of the other systems, Talk about plug-n-play, 10 minute switch over, keep us updated
Nice Job Axle. Your work is appreciatedHi Slick117
Thanks for the info. it is nice to read, that (almost) everything is fine. The lite dimly indicators might happen when the software option "Low Light" is activated or it just depends of the different wiring what I made for the Europen market. This affect the pins A27 and A28 for the rear side indicators what are wired in my EHC to ground instead of the turn lights. A12 and A13 changed to brake light / rear light combination and A2 and A9 changed to indicators left/right. This is in the same way like the rear light connections at the 2004 models. Just change the wires of the both rear lights in this way and everything will work if the software option "Low Light Off" will not work. I hope to borrow an US model rear light from the local dealer here next week what will allow me to play with it and find out a solution. The next option could be an EHC only for the US market, what will have just a bit different wiring on the rear lights. I attach the manual of my D-Box, what is identical from the software. This will help to change the settings. The pdf is from my Netherland distributor. He makes a much better translation compare to my lousy english...
By the way, I have put 2 plastic spacers between the board and the box, what will lift the board and connectors a bit in the box. I attach a photo:
View attachment 31320
About the starter: The maximum current is 30 Ampere and the current limitation of the high side switch inside of the EHC will switch off the output if higher currents will flow. The high side switch inside of the EHC will switch on again when the short circuit is eleminated. However, the high side switch can heat up to 140 degree Celsius in a very short time before limiting the current. This could result in that the box is not waterprooved anymore after the short circuit due to the small gaps. This is often a problem in electronic boxes with high side switches. We made some experiments with different potting compounds and found one (Odopal) what is (...a bit) more flexible compare to other compounds. However, your box will work for many years without problems if you don´t intend to make a short circuit
The 2004 EHC will be ready in a few weeks if the boards will pass the final test next week.
Does somebody have a schematic of a 2003 model? Is it similar to the 2004 or different? I have an inquire for a 2003 EHC and just hope that the 2004 EHC will work as well, if ready...
All the best!
Axel
2003 is a different ball of wax man. Not sure how all your work will transfer. 2004+ is when they went to momentary switches in the hand Controls prior to that was all Harley Rocker style latching switches
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KaptinAmerika
Guru
"However, your box will work for many years without problems if you don´t intend to make a short circuit "
I still think you need to do a real world starter overload test.
At some point its going to happen with these Big Twins.
WIth all the other work seeming to be so easy for you would it really be that difficult to add in a secondary relay circuit with a regular 30 amp fuse for the startter circuit.
This is the same issue these other systems have been suffering from so why not deliver the right thing the first time.
"I still think you need to do a real world starter overload test.
At some point its going to happen with these Big Twins.
WIth all the other work seeming to be so easy for you would it really be that difficult to add in a secondary relay circuit with a regular 30 amp fuse for the startter circuit.
This is the same issue these other systems have been suffering from so why not deliver the right thing the first time.
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