Description

Eaton 6-Speed, 7-Speed, UltraShift ASW, 10-Speed, UltraShift DM 2007 Electrical Schematic

I don’t care how many years you’ve been turning wrenches – when you chase an electrical ghost on a Gen2 Eaton automated transmission without the factory schematic, you’re guessing. That costs time, parts, and sometimes a fried ECU. I’ve seen guys replace a rail select sensor only to find they had a bad terminating resistor. The difference between a fast fix and a three-hour headache is having the right Eaton 6-Speed, 7-Speed, UltraShift ASW, 10-Speed, UltraShift DM 2007 Electrical Schematic on the bench. This 16-page PDF from October 2007 is the real deal – no reprints, no aftermarket redraws.

6-Speed and 7-Speed AutoShift Wiring Section

First pages of the TOC drop you straight into the 6-Speed and 7-Speed AutoShift wiring diagram. You’ll see every sensor listed – rail select, gear select, input shaft speed, output shaft speed, inertia brake, and that 30 AMP fuse. The diagram shows the terminating resistor placement on the J-1939 data link and the bulkhead connector at the firewall. Page 4 lays out the Trans ECU legend: (A1, E1) = +12 volt non-switched from battery, (B1, E2) = +12 volt switched from shift control, (F1) = signals into the ECU. That’s not generic – that’s Eaton’s own labeling.

Eaton 6-Speed, 7-Speed, UltraShift ASW, 10-Speed, UltraShift DM 2007 Electrical Schematic: What You Get

This document isn’t a shop manual – it’s a wiring-specific schematic. Every page is a one-page diagram per transmission variant. You get diagrams for:

• 6-Speed and 7-Speed AutoShift
• 6-Speed UltraShift ASW
• 10-Speed AutoShift
• 10-Speed UltraShift DM
• 18-Speed AutoShift
• Eaton Shift Lever
• OEM Shift Lever

Each diagram has the same dense pin-numbered layout with OEM responsible wiring marked as “typical”. The note on page 4 says: “All OEM responsible wiring shown is typical. Consult specific application.” That means you still need to check your chassis wiring, but the transmission side is 100% Eaton-factory.

3 Wiring Diagrams Every Mechanic Needs

First: the 6-Speed UltraShift ASW diagram. It shows the shield termination on the J-1939 data link and the run to solenoid on pins J1/K1. Second: the 10-Speed AutoShift diagram – same sensor set but different pin grouping for the 10-speed rail select motor. Third: the OEM Shift Lever Wiring Diagram on page 12. That one saves you when the customer swapped the shift lever with a non-Eaton unit. Without it, you’ll waste an hour tracing wires at the column.

Check the Shift Lever Wiring Before You Swap It

I’ve had three calls this year from techs who replaced an Eaton shift lever and then had no communication. They didn’t look at the Eaton Shift Lever Wiring Diagram. The factory diagram shows the six-pin connector assignments and the internal wiring. The OEM Shift Lever diagram shows the vehicle-side harness. If you mismatch them, you lose transmit or ground. That’s why this manual has both – you verify both halves before you button it up. Automotive Wiring fundamentals are useful, but this manual gives you the exact Eaton pinout.

Eaton Shift Lever vs. OEM Shift Lever: Factory Specs

The 7th bookmark in the PDF is the OEM Shift Lever Wiring Diagram. It’s separate from the Eaton diagram because OEMs (International, Freightliner, etc.) sometimes run different wire colors. The Eaton diagram is the baseline; the OEM diagram shows where the OEM breaks out the auxiliary inputs. Page 7 of the manual covers the 10-Speed UltraShift DM wiring – that’s the one with the DM (Direct Mount) solenoid pack. If you’re working on a truck with a DM transmission, don’t waste time on generic J1939 pinouts. Use this. Automotive Industry Overview documents won’t tell you that the UltraShift DM uses a different bulkhead connector than the AutoShift.

16 Pages – No Fat, Just Wiring

Sixteen pages, seven diagrams. Every page is a single spread with the full circuit. No filler, no advertising. The table of contents is on page 3. Page 4 starts the 6/7-speed layout. Each diagram has a legend box explaining the ECU pins. I’ve used these to diagnose intermittent no-start conditions caused by a bad terminating resistor on the J-1939 – the manual shows you where to measure resistance.

Why This Manual Belongs in Your Shop

Most aftermarket wiring books combine multiple years and guess at pin colors. This is 2007-specific, Gen2 electrical, from Eaton itself. The diagrams are reproduction of the actual factory blueprints. Every wire label matches what you’ll see under the hood. If you’ve been using a generic manual and scratching your head over a 10-Speed AutoShift that won’t shift, this is the fix. You need OEM data to get the torque converter lockup signal right.

Does this manual include the 18-Speed AutoShift wiring?

Yes. The 18-Speed AutoShift Wiring Diagram is on page 9 of the PDF.

What is the difference between the Eaton Shift Lever and OEM Shift Lever diagrams?

The Eaton Shift Lever diagram (page 11) shows the internal wiring of the lever itself – pin assignments, resistor values for the range select switch, and the connection to the transmission controller. The OEM Shift Lever diagram (page 12) shows the vehicle-side harness connector from the truck manufacturer. You need both because the OEM may use different wire colors or add auxiliary signal taps that the Eaton diagram doesn’t include. For example, on a Freightliner chassis, the OEM diagram might route the Aux #1 Output through a different pin. If you only use the Eaton diagram, you’ll miss that. Running the two side by side is the only way to verify continuity end to end.

If you’re working on a Gen2 Eaton automated transmission – 6-Speed, 7-Speed, UltraShift ASW, 10-Speed, or UltraShift DM – stop guessing on the wiring. Access the Factory Manual from AutoRepairManuals and get the exact schematic that Eaton released in 2007. That 16-page PDF will save you more than one tow bill.