New booster vs. old booster. The electrical connectors don’t match. Move the old connector to the new booster or replace the connector on the harness? I’m doubting moving the old connector across is as simple as putting a socket on it.
Resolved: brake booster connector mismatch
- Thread starter Rick2000
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Either or, your choice. Swapping the harness side connector housings is probably easier, but then I do this a lot. It's not hard.
BTW, are you sure you have the correct year model? IIRC, that's when the connector housing changed. @2001LC would know the details off the top of his head.
- Thread starter
- #4
It lists my brake booster as discontinued and superseded by this one. The pressure sensor for my brake booster is also listed as discontinued so maybe that’s why I have to switch.
You don’t have the part number for the harness side connector do you? Do I need new pins for the new connector or can I use the pins already crimped to the wires?
I don't, but it'll be in the Wire Harness Repair Manual. @2001LC knows what it is, I'm sure.
You can reuse the wires with the terminals on them. You just need to remove them (depin them) from the existing harness side connector housing. instructions are also in the manual. Gold–level resource, that.
Your new connector housing may need seals; buy the same color – the colors are gauge sizes. You can get them from Ballenger Motorsports. They carry almost all of the Sumitomo and Yazaki connector stuff you'll ever need.
The 47050-60041 booster ASSY w/ master (the whole brake master) with type "A" sensor (flat blade wire housing), is discontinued.
I've, they last new one, known, in the world.
What I've not check, globally. Is if just the master (W/O booster ASSY) with type "A". Check the number with your VIN# P/N 47025-60041
Easy way. Use Type "A" sensor (your old sensor) in new master, with your Type "A" wire housing block. But is untested, as far as I know. Compare them closely, once out pressure sensor out on the bench. The depth they go in, is what I'd be most concerned with. That, and diameter.
We do know. We can swap vehicles, wire housing block. Purchase 90980-11451 wire housing block form Toyota and swap over. By unpinning pig tails from old harness. Root around in mud. You'll find two that have done this.
I've, they last new one, known, in the world.
What I've not check, globally. Is if just the master (W/O booster ASSY) with type "A". Check the number with your VIN# P/N 47025-60041
Easy way. Use Type "A" sensor (your old sensor) in new master, with your Type "A" wire housing block. But is untested, as far as I know. Compare them closely, once out pressure sensor out on the bench. The depth they go in, is what I'd be most concerned with. That, and diameter.
We do know. We can swap vehicles, wire housing block. Purchase 90980-11451 wire housing block form Toyota and swap over. By unpinning pig tails from old harness. Root around in mud. You'll find two that have done this.
- Thread starter
- #8
Thanks so much for the part number. It's ordered. Now all I need is the pin-out.The 47050-60041 booster ASSY w/ master (the whole brake master) with type "A" sensor (flat blade wire housing), is discontinued.
I've, they last new one, known, in the world.
What I've not check, globally. Is if just the master (W/O booster ASSY) with type "A". Check the number with your VIN# P/N 47025-60041
Easy way. Use Type "A" sensor (your old sensor) in new master, with your Type "A" wire housing block. But is untested, as far as I know. Compare them closely, once out pressure sensor out on the bench. The depth they go in, is what I'd be most concerned with. That, and diameter.
We do know. We can swap vehicles, wire housing block. Purchase 90980-11451 wire housing block form Toyota and swap over. By unpinning pig tails from old harness. Root around in mud. You'll find two that have done this.
Found this in the EWD:
For Cruisers after 2002:
For Cruisers before 2002:
Couldn't find the part number for the M3 connector prior to 2002.
2000 LC. Found everything needed in the EWD, posted above. I wish I'd searched around more on mud to know this was going to be an issue before I got everything taken apart.
Am I correct???In all the Toyota triangular three prong connectors that I have seen the bottom prong is the ground. In the above picture the red wire is going into the bottom prong. I don't think the red wire is the ground wire.
You're altering braking system. Do so at your own risk.
I as a rule. My, recommendation when dealing with any brake master issue.
- Only a competent mechanic should work on braking system. One that has a very good understanding of the 100 series braking system.
- With any issue with brake master ASSY. Replace with new OEM of correct P/N for VIN.
I'll repeat:
I've never, convert brake master "A" to "B" type pressure sensor.
I've never look into wiring of master, signal from pressure sensor comparing "A" vs "B" to brake ABS/computers/etc.
_____________________________________________________________
@Rick2000 It does look like you found correct diagrams. But, "A" type wire housing. Which according to parts diagram was used: July 1999 thru Aug 2000 (2000 model). This is also what I've observed. Although there may be some 2000 manufactured after Jan 2000 with "B". Not sure why you found in a 2002 FSM EWD. Holder over from older publication perhaps.
Others have alter master, by changing wiring to pressure sensor. Did they do, it correctly IDK! Just because brakes appear to work okay. Doesn't nessasarly mean they will in all situations.
AHC has same issue with "A" type, being discontinued:
We do have the same issue, with the AHC pressure sensor. Old "A" type and newer style "B" type. I have convert these older AHC "A" type wire harness. By using newer "B" wire housing block. System worked fine. I simple order the newer wire housing block and swap it over.
- I compared wire diagrams in FSM EWD.
- Check how each tested (Ohm).
- Compare how each type, actually wire in vehicle.
- Swap in newer wire housing block. By depinning wires from old wire housing block. Repining into newer style wire housing block.
- Check in tech stream for any anomalies, after swap.
- Field tested.
_________________________________________
What I've not try on AHC, nor do I know any one that has on AHC or Brake Master.
Is simple swap over old "A" pressure sensor, to new style AHC or brake master. This would be easy, fast and cost nothing. We should replace O-ring. Which, we may be able to swap it also. Again. I've not look into this. To see if O-ring the same wall thickness and depth of sensors and it fitment all the same.
"Brandon's" looks wired differently. But I think it's just position of sensor making look wrong. He did not use a new wire housing block. But I think he's connected wires correctly. My understand is, he said it works. But, because we turn the key, start the engine and drive and brakes work. Doesn't mean, everything is all good. If his master fails him, send wrong signal to ABS at the wrong time. Lives are at stake.
Here a 2001 -2007 brake master with "B" type wire housing block.
90980-11451
2000 "A" type wire harness, wire housing block.
Last edited:
Here's A and B type, in FSM diagnostic, test and wire diagrams.
Shows, expected voltage at given brake pressure the same, either type A or B.
Shows, what each wire goes to in ECU. Just one of many test. But encouraging.
"A" type. Voltage read out, the same. Very good indicator.
B type
Important parts is Which color goes to which point in ECU.
"A" type
"B" type
Shows, expected voltage at given brake pressure the same, either type A or B.
Shows, what each wire goes to in ECU. Just one of many test. But encouraging.
"A" type. Voltage read out, the same. Very good indicator.
B type
Important parts is Which color goes to which point in ECU.
"A" type
"B" type
Last edited:
- Thread starter
- #13
Nope. You're right. I didn't realize I was looking at three bare wires just shoved into the sensor without the connector. Definitely doesn't match the wiring diagram.
Last edited:
- Thread starter
- #14
Just to finish up this thread, here’s the old connector for the last pressure sensor.
Here’s the one I picked up from the dealer today:
And here it is all installed and working on the new brake booster.
Other than having to wait for the weekend to be over for the dealer ship to open, replacing the connector was straightforward and hassle free - definitely the way to go if you own an older cruiser and can’t get booster with the type A connector anymore.
Thanks to all those who chimed in with help on this one.
Here’s the one I picked up from the dealer today:
And here it is all installed and working on the new brake booster.
Other than having to wait for the weekend to be over for the dealer ship to open, replacing the connector was straightforward and hassle free - definitely the way to go if you own an older cruiser and can’t get booster with the type A connector anymore.
Thanks to all those who chimed in with help on this one.
Curious about this, because if I search that part number, I see plenty of places it's available.
Perfect timing. Mine has decided to leak fluid everywhere. I have a 2000, with the 47050-60041. I have about 265k miles and i need to just replace the entire unit. Knowing that I can order 47050-60042 and get 90980-11451 Harness and swap over now brings me piece of mind.
Likely, if 47050-60041 ordered. Order will very likely, fail to be delivered. Same hold true for just the "A" type brake master pressure sensor. Same for "A" type pressure sensor on 98-00 AHC.
Different Toyota and Lexus Dealership, groups. Have different part system (warehouses and sister dealerships) they draw from. Also different software (web portals) in use. Some may show, they have and can be ordered. But when order placed, it will likely fail. Although, there may be a few remaining in stock hindden from online view.
I'll add:
Around 2000. We couldn't get either the 98-99 (1 rear brake line) or the "A" type brake master. IIRC, only the one booster ASSY w/master P/N availably, back then. I was buying Master and Booster ASSY separately, at a very high cost. Then assembling into a brake booster ASSY w/master.
Around 2021, IIRC. A cargo load came in. Suddenly there was ever booster ASSY w/master (all years). Best of all, prices drop. Now again, prices have gone up, and inventories have dropped. But this time, I do see OOP (out of production). Will they come back. Not likely!
The one I've got coming to me, now. Was not shown, in inventory. But the parts manager, had on the shelf. Which I found, by calling him. I then ordered online, using a different brake master P/N (same price). Then sent parts manager an email, asking to please swap to old P/N. It's why I often, tell people in mud. To, call around. Portals do not always give us what's on the shelf.
Check these various portals. NAL (no long available) N/A (Not available), OOP or P/N just changes:
Search
Search for genuine Toyota parts and accessories by model, year, drivetrain, and trim.
autoparts.toyotaofdecatur.com
BRAKE BOOSTER ASSY, W/MASTER CYLINDER 4705060041 | Toyota Parts | PartSouq
Quality parts for Toyota auto with fast ✈ delivery! Best prices on market for 4705060041 - BRAKE BOOSTER ASSY, W/MASTER CYLINDER!
New parts search — IMPEX JAPAN
en.impex-jp.com
Here's a Lexus portal, shows available. You can place in your cart and order. But when called on the phone. They do not have in inventory. Nor do they have available in their Lexus Group. Which they, pull form TX, CA, and others warehouses along with front range Lexus dealerships..
Here's another parts. Transmission valve body for the A750f (03-07) P/N is 35410-35A20.
I bough last one, known in the world. I've attempted to order from all over the world. All but one order failed. It's the A750f valve body.
The newest P/N this 35410-35A20. There is actually, 3 different P/N for 03-07 A750f Valve body. 03 has one, 04-07 another, then the final updated (newest)
Literally emailed Eric at Serra Toyota and he told me the system will not let them order 47050-60041. I will be ordering 47050-60042 and replacing the Harness to the new Triangle one.
- Thread starter
- #20
Well that’s the number I typed in at my dealer and the part it said it was superseded by the 42. Wish they’d have told me I needed the new connector at that time.
It’s really straightforward. The new connector even has the PIN numbers already printed on it. I colored them sitting inside looking at the wiring diagram to make it so once I was under the hood I wouldn’t get the pins mixed up.
The other tip I have is that depinning and repinning the new connector requires a lot of wiggling the pin to accomplish, not just pulling or pushing. You’re not done repinning until you hear the click and that requires wiggling once you’ve pushed it in as far as it will go.