Hi everybody,
I’ve been following this thread for the past six months, while waiting for my own Hot Toys BTTF2 DeLorean Time Machine to arrive in The Netherlands. I too was quite disappointed about the digital power switch on this otherwise amazing scale model (after Hot Toys fixed the breaking wheel struts). I had planned to keep it clean and safe under a custom-made acrylic cover, and powering it via a Hue smartplug. Well, as you know, this was not going to work, especially for the second light setting (flight mode; all lights on) which would not be remembered by the circuit board. But… thanks to some daring brainiacs on this forum a few clever solutions have been made! To everyone who pitched their ideas and how-to-instructions I say THANK YOU VERY MUCH! I really enjoyed taking in all your very helpful info and pictures. It made me confident enough to do this mod as well.
Now that I’ve had this awesome model in my possession for about 7 weeks, I finally had the time to pull off the modification last week. I hereby want to share my own experience with this daring endeavor, hoping I can add my 2 cents to this topic:
- First of all, this thing was not as easy to disassemble as I initially thought. After removing the hood, the wipers and the first ten screws, the first hurdle was the front grille. This grille is friction-held by two pegs and it was impossible to remove entirely by hand. I managed to get one side loose by carefully wedging a wide, flat (and blunt edged) screwdriver between one of the headlights and the side of the grille and slowly nudging it forward until the peg on this side came a little loose. I used the silver frame of the headlight as a lever. I did this without making any scratches or dents but it might be safer if you wrap a piece of cloth over the head of the screwdriver. The rest of the way I wiggled it by hand to loosen the peg on the other side. It then came off quickly, so I could remove the last two screws.
- With that done I now tried removing the complete frunk+fender part to get to the wiring. This is where it got a bit scary. I managed to wiggle it loose to a gap of about 10 mm above the black line that crosses the front fenders. But it just wouldn’t go ANY further than that, fearing I would break something. After closer inspection it seemed like the edge of the frunk that sits along the bottom of the windshield (normally hidden by the grille under the wipers) was very tightly pressed against the lower edge of the windshield. It seemed to be necessary to also remove the windshield before I could go any further. So, I also removed those four screws.
After that, it seemed easy to just lift up the bottom part of the windscreen and slide it out of the window frame. Unfortunately, that was not the case. The bottom edge of the windscreen was fitted very tightly. I had to carefully nudge it out with my fingers, pushing up from the inside of the cabin along the bottom edge of the window, evenly spreading out the pressure. If you encounter this same issue, do this VERY gently and don’t apply too much pressure in one place on this transparant plastic, because it might crack and cause irrepairable damage to the windshield. This was the scariest part of the entire disassembly, but with patience and delicacy, I managed to lift the bottom edge of the window and slide it out.
I then had another go at the frunk+fender assembly, and finally, this time it came off entirely and without too much effort. I put a microfiber cloth over the headlight frame to prevent scratches and carefully laid back the entire frunk over de headlights, without tugging at any wires. The wires leading to the battery compartment didn’t provide enough leeway at first, so I dissassembled that compartment first.
- Now before I go into detail about the wiring I would like to make a note that the earlier suggested ‘simple’ version of the mod, where the connections on ‘LED1’ and ‘LED2’ are swapped (combined with a taped-down button), does not actually completely swap the modes like I initially expected. I tried this, but what happens is that after the first press on the digital light switch ONLY the hover lights turn on, e.g. the LEDs in the wheels, undercarriage and the rear exhaust vents. The rest of the LEDs stay off. It’s the second press that routes the power to ‘LED1’ and ‘LED2’ SIMULTANEOUSLY, to make all lights turn on. I may have overlooked it, but I don’t think this was ever clearly mentioned in this thread. Since the second press setting is never remembered by the circuit board after a powercycle, I don’t think that this version of the mod is what anyone wants.
- Now on to the actual mod: For the bypass of the digital light switch I chose to do things a bit differently. I decided to only remove the three plugs from the circuit board that is directly connected to the light switch, and leave alle other wires in their original position. To connect the power plug to both the ‘LED1’- and ‘LED2’-plugs simultaneously I soldered together a Y-splitter cable using the suggested JST connector cables that I ordered from Amazon. I also created two extension cables for more leeway in routing the cables. And thirdly, I added two mini on/off slide switches that I assembled directly under the hood to maintain control over the two light modes. (I also looked at the 2-channel WiFi Smart Switch Relay Module that was mentioned in this thread, but I wanted a simpler and more foolproof set-and-forget method of control.) These slide switches (that I also ordered from Amazon) originally came connected to thicker wires and bigger plugs. They are easily opened, so I replaced the wires for the thinner JST ones. It had been about 30 years since I soldered anything so soldering these tiny connections with basic hardware and limited experience was quite a b*tch. But I perservered and succeeded.
- I then connected everything, tested it, and routed the cables in such a way that they wouldn’t get pinched anywhere. Some areas between the wheel arches and the bottom of frunk are quite narrow, so I took that into account. I taped all the wires in place with vinyl electrical tape. I drilled a single inconspicuous hole in the side of the cargo area of the frunk so I could route the cables of the slide switches through there. I had done all the measuring beforehand, so the slide switches fit perfectly when placed on their side, with about 2 mm to spare between them and the hood. They are held firmly in place with removable Tesa / Command strips.
- Mod done. Gently wiped the fingerprints from the windshield (use a new microfiber cloth and don’t rub too hard), and closed everything back up. This was also a bit of a challenge, because again, the window and the the frunk were a precise and tight fit. Carefully wiggled it al back in place, popped in the screws, the USB-C and the smartplug, and FINALLY I am able to fully power it remotely, via remote or voice! And, in the rare case that I would want to, I can always still change to both light settings.
By now you may have noticed: you have to REALLY want to do this modification because it is certainly not done in a jiffy. In my case, it was quite a hassle and sometimes a scary operation. If you encounter the same troubles I have, just take your time and don’t lose patience and force anything. Take it on as a fun and interesting project, like I did. I have very little experience with electronics and soldering, but I learned alot from this thread and along the way and managed to do it all without damaging anything. Couldn’t have done it without the people on this forum, so happy to pay it forward with this detailed report.
Below some pictures and a video to illustrate my version of the mod.
View attachment 679702