AUX switch install

Lethal69GTO · March 25, 2023

Follow-up to my previous post. TinkeringFox has identified the terminals on Page 15 of this thread. I added some additional info.

S48A-X2 (18-cavity connector) - AUX 1 through 4 button press trigger (signal)
- Cavity: 10-13 (10=AUX4, 11=AUX3, 12=AUX2, 13=AUX1)
- Mouser P/N: 306-SHCM-A03T-P025
  - JST Automotive, FEMALE 1.5MM, 22-20AWG
- - OR-
- Mouser P/N: 306-SHCM-A04T-P025
  - JST Automotive, FEMALE 1.5MM, 24AWG
S48A-X1 (6-cavity connector)
- Mouser P/N: 571-5-962885-1 (see drawing in previous post)
  - TE Connectivity, FEMALE, 24-22AWG
X61A-X1 & -X5 - Relay Trigger (signal) Wire (for use on small male spades)
- X5 Cavity: 10=AUX1, 11=AUX3, 17=AUX2, 23=AUX4
- X1 Cavity: 21=AUX1, 30=AUX3, 34=AUX2, 38=AUX4
- Mouser P/N: 272-7116410002
  - YAZAKI, FEMALE 1.5mm, 20AWG
X50A-X3 & -X4 - Upfitter Relay Trigger (signal) Wire (for use on small male spades)
- X3 Cavity: M5=AUX1, F3=AUX2
- X4 Cavity: L6=AUX3, L1=AUX4
- Mouser P/N: 272-7116410002
  - YAZAKI, FEMALE 1.5mm, 20AWG
X50A-X3 & X4 - Upfitter Relay Output Voltage (for use on medium male spades)
- X3 Cavity: M7=AUX1
- X4 Cavity: G2=AUX2, K5=AUX3, K2=AUX4
- Mouser P/N: 272-7116411202
  - YAZAKI, FEMALE 2.8mm, 14AWG

NOTE: User CAPTADAMJ posted excellent "how to" on page 22 of this thread.

Be sure to review Upfitter Bulletin 110N (or newer) RPO 9L7 (LINKY HERE) pages 6 through 8 detailing the proper configuration of fuses in an X50A Under-hood Electrical Center (UEC) fitted to handle the usage of these switches.

-Darryl

Edited March 25, 2023 by Lethal69GTO
Added X61A-X1 & X5 and additional data.

Jdb1944 · March 27, 2023

On 3/25/2023 at 5:17 PM, Lethal69GTO said:

Absolutely frustrating for sure. I am going through this thread yet one more time. Digikey does have the information you seek, it is not so obvious to acquire as can be on Mouser Electronics. I had to select the 'EDA Models' hyperlink "5-928999-5 by SnapEDA" which brought me to SnapEDA web site. On it, I selected 'See Datasheet PDF" on the left side.

I went to Mouser and searched using the same part number, 5-928999-5. LINKY HERE. Below is the datasheet.

ENG_CD_929454_C26-2426561.pdf 459.77 kB · 1 download

Thank you. That's the best data yet. So I performed a test yesterday using just 16 ga wire in the connector body to see if I could get the light relay to work as I already the auxillary upfitter switch. No luck. The aux switch LEDs would light indicating they switches were on but relay for light bar would work. Other threads and YouTube vids stated these switches close to ground and that's how I wired the relay to switch the ground. I checked switch to ground function with a multi meter and it did indicate ground most of the time. Sometimes when grounded woul lose LED indicator function on switches. I'm fed up with trying to get the upfitter switch to work so sending back. Unfortunately can't send back the 13575783 GM wires.

jonathanspw · March 31, 2023

I grabbed a new switch panel (TC, cargo light, aux 1-4) and thanks to the wonderful posts from @TinkeringFox, @Lethal69GTO, and @tha_lildude I've successfully wired it into my factory x50a block.

I got partially lucky and even though I didn't have the wires already run to the x48a block, I DID for whatever reason already have an x50a block with the proper terminals so all I had to do was run from x48a to x50a.

Now here's my question: what the heck is the part number for the factory relay? It doesn't look like any other relays in the box that will fit the locations for the factory upfitter relays are 30A relays...but I'm also not finding much info on them spec-wise. From my understanding these are 30 amp circuits right so I need a 30A or higher relay?

Any help would be greatly appreciated. I was eyeing maybe the GM 9815 "HI PWR" relay but the only docs I can find on that seem to cite 10A but that's probably not even reliable since it's just on an Amazon listing.

Edited March 31, 2023 by jonathanspw

jonathanspw · March 31, 2023

Welp I think I found it.

According to https://static.nhtsa.gov/odi/tsbs/2015/SB-10089968-2280.pdf (GM service bulletin 15411) it is the 9815 "HI PWR" relay and they are indeed 30A circuits, so I guess that relay can support 30A.

Edited March 31, 2023 by jonathanspw

Lethal69GTO · April 1, 2023

2 hours ago, jonathanspw said:

Welp I think I found it.

According to https://static.nhtsa.gov/odi/tsbs/2015/SB-10089968-2280.pdf (GM service bulletin 15411) it is the 9815 "HI PWR" relay and they are indeed 30A circuits, so I guess that relay can support 30A.

@jonathanspw Great job! Congrats on completing the upgrade. Great info find on the fuses as well.

Bypassing X61A is the route I will be taking as well with the thought of using a multi-conductor cable from Automation Direct rather than running individual wires through the firewall. Still noodling that.

The swapping out my factory DPN mirrors with after market mirrors having same features plus power folding and puddle lamp completed today so the Upfitter switches is next on the list.

jonathanspw · April 1, 2023

7 hours ago, Lethal69GTO said:

@jonathanspw Great job! Congrats on completing the upgrade. Great info find on the fuses as well.

Bypassing X61A is the route I will be taking as well with the thought of using a multi-conductor cable from Automation Direct rather than running individual wires through the firewall. Still noodling that.

I used https://www.amazon.com/dp/B07TLB9VYX which worked well and fit the connectors perfectly.

For the outputs/load wires from X50a I actually managed to fit 12ga wire on the connectors which makes me feel a bit better should I ever have full 30A loads on them.

I didn't have too much trouble getting through the factory firewall boot (once I found the dang thing on the inside). If you unmount the x61a then the boot is literally directly behind it with the main harness going through.

Relays and fuses come in today so I can test all the way through to my outputs. So far I've only tested that with fuses/relays in place that the relays actually trigger from the switches (just pulled small fuse/relay from elsewhere for the sake of testing this).

Lethal69GTO · April 1, 2023

1 hour ago, jonathanspw said:

I used https://www.amazon.com/dp/B07TLB9VYX which worked well and fit the connectors perfectly.

Yup. Petty much what I purchased except outer jacket is not so thick. Appreciate the recommendation.

1 hour ago, jonathanspw said:

For the outputs/load wires from X50a I actually managed to fit 12ga wire on the connectors which makes me feel a bit better should I ever have full 30A loads on them.

Also a consideration I had just for the same reason. Good to know you successfully squeezed a 12AWG into it.

1 hour ago, jonathanspw said:

If you unmount the x61a then the boot is literally directly behind it with the main harness going through

Yup, thank you. I am familiar with it as it is where I passed my mobile HAM transceiver power circuit through. Forward thinking, when I pulled that power circuit through a small gauge wire was also pulled with it and left inserted through the pass-through. When I pull the four conductor cable for the Upfitter signal circuits using it I think will also leave a pull-wire, never know if it will be needed down the road.

1 hour ago, jonathanspw said:

Relays and fuses come in today so I can test all the way through to my outputs.

Awesome. Hope all goes well.

jonathanspw · April 2, 2023

12 hours ago, Lethal69GTO said:

Awesome. Hope all goes well.

All went well! All 4 circuits are live and working on their respective switches! Also got my dash cam hard wired into RPO power in the driver's side fuse panel. Successful day I'd say!

Lethal69GTO · April 2, 2023

12 hours ago, jonathanspw said:

All went well! All 4 circuits are live and working on their respective switches! Also got my dash cam hard wired into RPO power in the driver's side fuse panel. Successful day I'd say!

Congratulations! Definitely a successful endeavor.

Lethal69GTO · April 2, 2023

For those who are following footsteps of @jonathanspw, I looked up the parts on GM Parts Giant specified in previous post with the PDF attachment for RPO 9L7. Parts can be sourced elsewhere, verify, use information at own risk.

Relay (4 required, choose one of the following):
- 19116057, Relay Assembly, High Power, Multi-use, Gray, 12V, 35A, 4-Pin (GM PN 19116057)
- 13500114, Relay Assembly, High Power, Multi-use, Gray, 12V, 4-Pin (GM PN 13500114)
  Replaces: 12088567, 12135170, 12193606, 15328866, 15393412, 19115080, 19116057
Fuses:
- 19209790, Micro Blade, 5A, tan (2 required) (GM PN 19209790)
- 19209796, Micro Blade, 30A, green (4 required) (GM PN 19209796)

NOTE: Simply adding these fuses and relays does NOT automatically infer the Upfitter AUX 1 through 4 switches will function. As documented throughout this thread, the vehicle must also have the underlying wiring in place - at a minimum between S48A X1 and X50A X3 and X4. Factory wiring also uses X61A X5 and X1.

As documented in PDF attachment in previous post and the Upfitter Integration Bulletin 110N, the placement of the fuses in X50A controls the powering (battery or ignition) of the AUX switches, improper placement could damage the vehicle's wiring. Research and verify.

Larry Huffstutler · August 24, 2023

My 2015 Silverado WT had the harness from S48A to X61A but was not connected to X50A. I installed a 6 relay fuse/relay box outside the firewall just above the Upfitter passthrough boot and tied the wires into X61A, X1. I wired the relays for ground trigger. The Upfitter switch I got has TC, Cargo Light, CNG, and 4 AUX switches. I used the CNG switch for my air bag compressor by using an ESP32 to make the CNG relay latching. The CNG switch uses the exhaust brake pin in S48A, X2. I am pulling power from X61A, X7. So here's my problem, if I tie into Battery Positive Voltage (15 amp) everything works fine, but if I use Accessory Voltage (10 amp) or Run/Crank Ignition 1 Voltage (15 amp) nothing works and the indicator lights show 3 of the aux switches on. All are switched off. These lights come on when a door is opened as well. Again everything works as it should with it tied to Battery Positive Voltage at X61A, X7.

Any thoughts?

Okay, I found a blown fuse which fixed part of the problem. I still have the indicators coming on on aux1, 3, and 4 but not aux2. This happens when I open the door and goes off when I turn on the ignition. From what I see in the wiring diagram why are they not all on?

Edited August 25, 2023 by Larry Huffstutler
addition