Trailer Plug disables ACC

[ciaranob]

Yep, I have the same behavior.

At this point, unless ACC is engaged, there is not an advisory. After I engage ACC, it tells me that it's not available.

All is nominal except for ACC.

CT 4S, Premium Package + RAS + 150kw/400v + powered charge ports. I'm now tinkering w/ the adapter to see if it's related to how the 13-pin to 4-pin adapter is setup (resistance).

Hmmm interesting - when I checked early this AM I tapped on the ACC from the Steering wheel stalk and it reported ON and no errors. Do you have to be actively driving for the error you are seeing to appear?

PS: my spec in my main mods thread but have all that and everything else!! . Only thing I did not spec TBH was Innodrive.

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[ciaranob]

I wonder could someone measure the resistance of all of the conductors/lights of the Porsche carrier and share that in order to allow replication of similar load ranges on other plugs / lights?

Would be good to have - surely there is a tech spec sheet for this somewhere?

I actually purchased the correct load resistors (to mimic load of incandescent) which theoretically if installed would dismiss my white ‘advisories’ but TBH it is so little hassle for me to click the return arrow 3 times that I am prob not going to bother setting that up.

 

[bsclywilly]

I've a theory of why this is not working. I think that if the notification comes up that there is a "defective" trailer BRAKE light, ACC is disabled. It's fine that the left and right indicator for the trailer lights are "defective", but not the brake light.

This could very likely be the case. I’ve had past cars where the cruise would not work if the brake circuit was open. …Although that was a brake switch circuit, not light.

 

[ciaranob]

This could very likely be the case. I’ve had past cars where the cruise would not work if the brake circuit was open. …Although that was a brake switch circuit, not light.

Yep indeed this is a brake light only and identical gear in my car is not reproducing this error - seems something that is car specific.

 

[TaycanCook]

After I put two load resistors (5watt 33ohm) in parallel with the turn signal pins, I no longer get the warnings at start up and I have ACC back. This closes out this saga. Hope this is useful for others looking to do the same setup.

 

[ciaranob]

After I put two load resistors (5watt 33ohm) in parallel with the turn signal pins, I no longer get the warnings at start up and I have ACC back. This closes out this saga. Hope this is useful for others looking to do the same setup.

interesting - as I mentioned previously I too had purchased load resistors but haven’t bothered to install as all I get is the soft warnings which take but a moment to dimiss on startup.

Still odd that you lost ACC when I don’t despite the apparently having the exact same components - weird!

But good result - congrats - don’t plan on messing with my setup as happy with it but would be good if you could perhaps share pics of how and where you installed the resistors

 

[TaycanCook]

Pics and instructions as requested of the carrier.
Parts needed:
1. load resistors - 5w 33ohm - 2 pieces
2. Trailer adapter 13 pin to 4 pin flat.
3. 20 or 18gauge wire

Tools:
1. soldering gear (iron, flux, wire)
2. screw driver
3. shrink wrap
4. heat gun

Instructions:
0. Open up the adapter (undo the gland nut, undo the middle shaft)
1. solder 4 inches of wire on each side of each resistor and shrink wrap
2. Connect one resistor to pin 4 (green - RH indicator) and to pin 3 (ground)
3. Connect one resistor to pin 1 (yellow - LH indicator) and to pin 3 (ground)
4. reassemble the adapter.

Notes:
Load resistors aren't directional, so which way you connect the wires doesn't matter.

 

[ciaranob]

Pics and instructions as requested of the carrier.
Parts needed:
1. load resistors - 5w 33ohm - 2 pieces
2. Trailer adapter 13 pin to 4 pin flat.
3. 20 or 18gauge wire

Great stuff - thx for sharing - for ref these are the load resistors I bought - got 2 sets if needed (recommended to me by the staff at eTrailers where i got the lights) - alternative to soldering as already have the 4" of wire attached each end and have snap-on blade connectors - that said soldering is always the best way to go!

I'm not going to bother with them as explained in prior post above but was considering an external (to plug) mount to dissipate heat as theses things can get quite hot.

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