Holy Grail Labs - Blade Fuse Upgrade Kits

[Galahad]

God damn it. That's supposed to be on the other side of the fuse. Thanks for pointing it out, I'll include something in the rest of the relevant shipments to make it clear.

I just double checked the pcb layout history, that pin moved when I updated from kicad 5 to kicad 6 (I had to basically redo the whole layout because reasons). This will only be an issue on the -11 boards, I had changes I wanted to make anyway. Sigh.

Your fuses 13/14 were seriously melted, geez.

[Galahad]

Just to keep everyone in the loop:
I've contacted everyone with boards that have the misplaced blade issue to let them know about it and offered to exchange them when the updated ones are ready.
I also did a full installation walkthrough video on one of my cars since people had been requesting one, I'm currently still editing it. That should be available in a few days.
Here's a link to an excerpted section specific to handling cutting the additional hole: https://youtu.be/iHnT49actrw
I'll post a link to the full installation video when it's all done.

[tig]

Thank you everyone for your advice! I’ll definitely do that. My e12 is garaged and only goes out in fine weather and at the moment it’s cold and wet here in Melbourne, Australia so I definitely won’t be rushing it! I’ll order one later today. I don’t suppose there are any discount codes? I’m just being cheeky
Cheers Scott.

Sadly, we will be raising prices soon given the significant increase in component costs driven by supply-chain issues, fuel price increases, and the chaotic global situation. Just say'n.

https://www.holygraillabs.com/

[virginpilot]

I just ordered mine tonight before I actually saw this so good timing!
I’m looking forward to getting this for my e12

[Galahad]

I finished editing the full install video instructions, view them here: E28 Blade Fuse Retrofit Kit Install Walkthrough

[BRRV]

I'm waiting for mine, ordered a while ago, but before the price increase.. and will install it in a NOS fuse box assembly that I've had for decades in the spares. I'm hoping this will cure some interesting voltage issues with instruments and so on. I'm going to add another ground off the alternator at the same time, back to earth. I keep chasing gremlins!

[Galahad]

I'm waiting for mine, ordered a while ago, but before the price increase.. and will install it in a NOS fuse box assembly that I've had for decades in the spares. I'm hoping this will cure some interesting voltage issues with instruments and so on. I'm going to add another ground off the alternator at the same time, back to earth. I keep chasing gremlins!

Shipments should pick up again soon, waiting on a couple parts still.

Alternator grounding: I'd be more inclined to redo the alternator to block line, then make a line from the driver's motor mount to the battery instead of from the alternator to the battery directly. This significantly shortens the current path to the battery for both the starter and the alternator and you avoid any chance of starter current going through the alternator-specific ground.

[BRRV]

Alternator grounding: I'd be more inclined to redo the alternator to block line, then make a line from the driver's motor mount to the battery instead of from the alternator to the battery directly. This significantly shortens the current path to the battery for both the starter and the alternator and you avoid any chance of starter current going through the alternator-specific ground.

Okay, that's what I'll do. The alternator to block line is original, and likely a little cooked anyway. Thanks for the tip. And for the update

[Galahad]

Parts arrived and I confirmed the design is fixed. I should be able to get existing orders out by the end of the month - the garage is extremely hot at the moment (just like everywhere else) which is slowing me down a bit

[tig]

[Shawn D.]

Too bad Y'all enshrined that incorrect quote from The Holy Grail on the boards!

The guy never says "yet," Y'all.

[tig]

You're not wrong. Thanks for pointing it though.

[Shawn D.]

LOL, anytime!

[Dgohwanger]

I installed mine this weekend. It looks great! Thanks, cek for the troubleshooting help!

This morning I noticed my anti-lock brake light was on...has anyone had this issue after the retrofit installation? Maybe it's just a bad sensor and timing coincidence...?

[tig]

I installed mine this weekend. It looks great! Thanks, cek for the troubleshooting help!

This morning I noticed my anti-lock brake light was on...has anyone had this issue after the retrofit installation? Maybe it's just a bad sensor and timing coincidence...?

Likely a coincidence, but let's dive in and find out...

Using the '85 E28 ETM since you have a 1985 535i:



ABS itself runs directly from the battery (ABS ECU gets its power from the Ignition switch in RUN position, and the ABS Pump gets power directly from the battery). Fuse 12 does go to the brake switch, and when the pedal is pushed, 12V goes to Pin 25 of the ABS ECU.

I cannot find any more info on the ABS Warning Indicator on the diagrams for the instrument cluster. Never noticed this before. I checked the '88 ETM and it's not there either. Odd (maybe I'm not seeing it?).

Anyway, from the above pages, it appears the ABS Indicator light gets 12V from the ignition switch when in "RUN" via the .75 GN wire that also powers the ABS ECU (Pin 1) ("M").

The ABS Indicator light ALSO gets 12V from two other sources:

- Pin 1 from the ABS Hydrauluc unit (.75 GY/RD).
- Pin 29 BK/GY on the ABS ECU) if it detects a bad sensor amongst other things.

I don't think it's possible for that light to come on unless EITHER Pin 29 of the ECU or Pin 1 of the ABS unit is hot.

Further, I don't see any wires in the fuse box itself that deal directly with the ABS system (other than Fuse 12. See xls here: https://kindel-my.sharepoint.com/:x:/p/ ... i7Jg-h-2kg

Thus I think this is a coincidence and either

- An ABS sensor has failed (a common thing)
- The ABS pump has failed (uncommon IIRC)
- The ABS ECU has failed (uncommon IIRC)

Your best bet now is to read one of the many threads on testing the ABS sensors...

[Dgohwanger]

I installed mine this weekend. It looks great! Thanks, cek for the troubleshooting help!

This morning I noticed my anti-lock brake light was on...has anyone had this issue after the retrofit installation? Maybe it's just a bad sensor and timing coincidence...?

Likely a coincidence, but let's dive in and find out...

Using the '85 E28 ETM since you have a 1985 535i:



ABS itself runs directly from the battery (ABS ECU gets its power from the Ignition switch in RUN position, and the ABS Pump gets power directly from the battery). Fuse 12 does go to the brake switch, and when the pedal is pushed, 12V goes to Pin 25 of the ABS ECU.

I cannot find any more info on the ABS Warning Indicator on the diagrams for the instrument cluster. Never noticed this before. I checked the '88 ETM and it's not there either. Odd (maybe I'm not seeing it?).

Anyway, from the above pages, it appears the ABS Indicator light gets 12V from the ignition switch when in "RUN" via the .75 GN wire that also powers the ABS ECU (Pin 1) ("M").

The ABS Indicator light ALSO gets 12V from two other sources:

- Pin 1 from the ABS Hydrauluc unit (.75 GY/RD).
- Pin 29 BK/GY on the ABS ECU) if it detects a bad sensor amongst other things.

I don't think it's possible for that light to come on unless EITHER Pin 29 of the ECU or Pin 1 of the ABS unit is hot.

Further, I don't see any wires in the fuse box itself that deal directly with the ABS system (other than Fuse 12. See xls here: https://kindel-my.sharepoint.com/:x:/p/ ... i7Jg-h-2kg

Thus I think this is a coincidence and either

- An ABS sensor has failed (a common thing)
- The ABS pump has failed (uncommon IIRC)
- The ABS ECU has failed (uncommon IIRC)

Your best bet now is to read one of the many threads on testing the ABS sensors...

Thanks, cek.

I'll look into it today after work. Hopefully it won't be too much of a dive but you never know. I may be calling you for some diagnostic tools! Keeping my fingers crossed.

[Johannensc]

Hey Galahad. I'm just installing mine in my e28 535 but car wont start. No LED on fuel pump fuse. Everything else seems to work. Plugs match the picture I took before. The car started last night before install

[Galahad]

Hey Galahad. I'm just installing mine in my e28 535 but car wont start. No LED on fuel pump fuse. Everything else seems to work. Plugs match the picture I took before. The car started last night before install

Thanks for reaching out! No light on the fuel pump fuse means the fuse isn't being powered. The ECU controls the fuel and only turns the pump on when it sees the engine cranking, so there's probably a problem in the power delivery to the fuel pump or to the ECU. Does the car crank when you try to start the car?

[Johannensc]

Thanks for reaching out! No light on the fuel pump fuse means the fuse isn't being powered. The ECU controls the fuel and only turns the pump on when it sees the engine cranking, so there's probably a problem in the power delivery to the fuel pump or to the ECU. Does the car crank when you try to start the car?

Yes it cranks! Looks like the Main Relay is getting power but not getting the signal to turn on. Same with the fuel pump relay

[Galahad]

Thanks for reaching out! No light on the fuel pump fuse means the fuse isn't being powered. The ECU controls the fuel and only turns the pump on when it sees the engine cranking, so there's probably a problem in the power delivery to the fuel pump or to the ECU. Does the car crank when you try to start the car?

Yes it cranks! Looks like the Main Relay is getting power but not getting the signal to turn on. Same with the fuel pump relay

ECU controls both the main and fuel relays. Is the ECU getting power?

[jc72]

Just installed mine this afternoon and wanted to thank you for a great product. The most tedious part was removing the old fuse holders from the box but the install was easier than I expected.

[Galahad]

Just installed mine this afternoon and wanted to thank you for a great product. The most tedious part was removing the old fuse holders from the box but the install was easier than I expected.

Thanks you! Always happy to hear installs went well.

[Cannabis9478]

Sorry for the late reply but I have installed mine earlier in the year.
Thanks for making this prodcut. Very happy and I don't have to worry about bad fuse connections ever.
Highly recommended!!

[twin55]

Installed mine Holy Grail on 10/21/2021

[Galahad]

Looks great! The fuse puller is a nice touch

[Galahad]

Our assembly robot hurt itself today - looks like some of the servo wiring to the gantry fatigued out while I was pushing it a bit and the vertical axis isn't functioning. I was warned this "happens every so often" by the guy I bought it from so it's not entirely unexpected, but I didn't think it would go from working to busted this quickly. Frustrating but not the end of the world.

However, the manufacturing line is down until I can get the repairs done which will have to wait until I've taken my PhD qualifying exam later this month. I'd guess we're looking at a 6-8 week delay for orders placed through the HGL website.

Nothing ever breaks when it would be convenient; such is life.

[Shawn D.]

Folks should understand that endeavors like the one Y'all have going are niche and are not built to have redundant systems in place, nor should they. Doing so would only drive up the cost of the low-production parts. A short wait for these is not a big deal, given the fact that decades have gone by with no viable alternative in the first place.

[Galahad]

Thanks Shawn - I don't think everyone realizes all the manufacturing is done by a grad student in a garage.
I'm pretty frustrated but I don't think it'll end up being a major setback. I did end up having to place >2500 resistors by hand with tweezers yesterday for a sponsorship project which was exactly as fun as you imagine.

[jayjaya29]

Good luck with your PhD entry exam. I flunked out before I got to mine.

[Panici]

Folks should understand that endeavors like the one Y'all have going are niche and are not built to have redundant systems in place, nor should they. Doing so would only drive up the cost of the low-production parts. A short wait for these is not a big deal, given the fact that decades have gone by with no viable alternative in the first place.

Well said.

Good luck on your exam Galahad!