Cat High Flow Switch

Nige said: Gotcha. I doubt if the electrical pinout/wire colours for that harness are available anywhere other than a factory drawing. I'll ask around and see what turns up. What's strange is that the schematic for the planer clearly shows an 8-pin connector and the poster says he has 9 wires. EDIT: It would be strange if the wire colours & numbers in the "jumper" harness were any different to what's on the machine or what's in the planer though. Click to expand... That schematic doesn't match up. I still have 3 wires left. An orange, black and 1 more. I tried using that schematic and leaving those "extra" wires out but I keep blowing fuses.

Nige said: Are you trying to mount the planer on a Cat skid steer.? If yes, can you supply the S/N of the machine. Would you also make a list of the colours and numbers of each wire in your photos above. I can see some of them but not others. The plug in your 2nd photo doesn't look like a typical Deutsch plug as used on Cat equipment unless it's a trick of the photo. Maybe another photo from slightly further away.? Click to expand... The plug looks wierd because it's the inside of the wiring harness still plugged into the machine. I'm mounting it on a 262d, Dtb05585. All functions were working until we yanked the wires out.

I think the harness that I have is part of a conversion kit made to go from a 5 line system to a 3 line. The alleged part number for the harness in that kit is 378-3721. Still can't track down a pin out.

Can someone post up the PC306B HFP00001 and up schematic? It may take us where we need to go. As an aside, the original connector will have the socket latches broken and the wires will hot stay in.

heymccall said: Can someone post up the PC306B HFP00001 and up schematic? It may take us where we need to go. Click to expand... Here's the connector pinout for the HFP. 14-pin connector. Promising. it shows pins G & H, plus L, M, & P all blank, just like the OP's photo.

heymccall said: As an aside, the original connector will have the socket latches broken and the wires will not stay in. Click to expand... Absolutely. It's going to need a new Deutsch connector for that end of the harness.

Nige said: Here's the connector pinout for the HFP. 14-pin connector. Promising. it shows pins G & H, plus L, M, & P all blank, just like the OP's photo. View attachment 227575 Click to expand... This looks spot on. I'm gonna try it tomorrow. It's getting dark too early and it's pouring rain. I'm kind of glad that the back wasn't on the plug. Instead of the wires just getting pulled out it could have been much worse. I'll keep you guys posted. Thank you so much.

Nige said: Here's the connector pinout for the HFP. 14-pin connector. Promising. it shows pins G & H, plus L, M, & P all blank, just like the OP's photo. View attachment 227575 Click to expand... Eureka!!!! You guys are the best. 3 different dealers couldn't help. A big weight has been lifted off my shoulders. Do you mind if I share this with everyone? I'm sure I'm not the only one this has happened to.

Credit HMC. He was the one who supplied the clue where to look. All I did was to download the info........ Although I'd be interested to hear where the idea of looking in a different model for the wiring pinout came from......??

Its all in the posts above, the clue, that is. PC206 only ever came new with an 8 pin connector. "PC206 with 14pin" led to conversion instructions from Caterpillar kit. Googled newer Caterpillar PC planers to get a newer model number, because I know that they have 14pin connectors and found the serial number range using avspare. That's where I ran into brick wall, as I dont have SIS. And I couldn't pull a schematic from Google. I use AVSPARE . COM

Well done that man.......!!

I have another question. My 262d is an xps. I hear of the screen showing a high flow symbol when a high flow attachment is connected. How come my high flow option isn't activating when I attach this planar?

Test both K & N on your planer harness and make sure that they are both connected to B. You may have a broken wire. Did it work before the plug was damaged this time? Are you sure that you don't have another blown fuse from putting the pins in the wrong holes?

heymccall said: Test both K & N on your planer harness and make sure that they are both connected to B. You may have a broken wire. Did it work before the plug was damaged this time? Are you sure that you don't have another blown fuse from putting the pins in the wrong holes? Click to expand... I replaced all the blown fuses. It didn't work before I pulled the wires. I'll check it with my ohm meter tomorrow.

As HMC said you need to check the continuity of those two wires all the way back to the ECM. There was a case a couple of weeks ago where a break was found in a harness somewhere back in the machine that was preventing continuity in the necessary ground detection loop that the ECM uses to activate High Flow. Here's a link to the thread - https://www.heavyequipmentforums.com/threads/cat-279c2-no-high-flow.85591/ If you would like an Electrical Schematic so that you can locate the harness connectors and stuff please ask. IIRC there is at least one (maybe two) major harness connectors between the one on the Lift Arms and the ECM.

Here's the Work Tool connector on the Schematic. Wire C460 (Pin K) from the ECM needs to see ground via wire 200 (Pin B) in order to activate High Flow. C460 goes through 2 major connectors between the ECM and CONN 30 so dividing the harness into sections for troubleshooting would probably be the way to go.

Forgive my ignorance but is there a pic or description of what the high flow activation on the screen looks like? I have the upgraded screen with the backup can on my 262. When I hit the trigger to spin the drum I see what looks like a hydraulic symbol. Is that it?

Easiest way for me to test for high flow activation..... Operate planer drum with harness unplugged, then..... Operate planer drum with harness plugged in.

Also sounds like you could use an Operation & Maintenance Manual. The first thing that usually goes missing when used equipment changes hands. They're available to download from Cat, or look for Cat Pulbication SEBU9084. https://www.ebay.com/itm/Caterpilla...17-Operation-Maintenance-Manual-/143031687118

Hello everyone, I’m not sure if this is the right place to post, so feel free to let me know if I should open a new topic. I have a Caterpillar 289D, serial number TAW05718, and I recently purchased a Simex PL5020. On the Caterpillar, I have a 9-pin connector. On the asphalt planer, there are 12 wires (11 white and 1 black). One of them is for the water pump (I could run that separately with its own switch if needed). My question is: how should I connect the planer to the machine? Is it possible to have all functions controlled through the joystick? Also, for my model, should I connect pin K to B or pin N to B in order to activate the high flow function? Any help or guidance would be greatly appreciated.