Description

Mitsubishi FB13PNT, FB15PNT, FB18PNT, FB20PNT 2011 Wiring Diagram – OEM Factory Manual

I’ve been wrenching for 28 years. If there’s one thing that burns my ass more than a stripped head bolt, it’s a wiring diagram that doesn’t match the truck in front of me. Aftermarket schematics are guesswork. This 23-page original Mitsubishi document for the Mitsubishi FB13PNT, FB15PNT, FB18PNT, FB20PNT 2011 Wiring Diagram is the exact print used on the LUNA (MCFA) platform. No redrawn lines, no translated labels. You get the same circuit sheets Mitsubishi Heavy Industries issued to their dealer network.

36/48V Power Supply Circuits (Sheet 01)

Page 1 shows the main power distribution. A 325A fuse (F1) feeds the pump inverter, EPS controller, and key switch. The 40A fuse (F2) protects the pump inverter separately. If you’re chasing a no-power or intermittent shutdown condition, start at the 36/48V supply bus and verify the bus bar connections. I’ve seen more than one shop waste hours on a controller swap when the problem was a corroded bus bar on sheet 01.

Motor Control and Logic Units (Sheets 11-14)

The manual covers the motor control circuit, logic unit, input unit, output unit, and CAN circuit across sheets 11 through 14. Each sheet labels the connector IDs (e.g., G-114, G-49) and wire colors. The OCR excerpt shows the line contactor (MC1, MC2) and steering contactor. Need to trace a horn relay that won’t drop out? Sheet 09 has the horn circuit. The manual notes that the horn switch circuit differs in hydraulic control type – an OEM-only detail you won’t find in a Chilton.

23 Pages of Factory Circuit Schematics

Every sheet is numbered and dated 2011.07.01. Page 2 shows the actual wiring for the key switch, PDS buzzer relay, back buzzer relay, and lift lock solenoid. The document includes connector pinouts on sheets 19-23. When I had a lift lock solenoid that wouldn’t energize, I used sheet 14 to find the PKB forced release connector (U). That saved me from tearing out the entire harness. A 23-page document that gets you to the right connector in two minutes is worth thirty aftermarket PDFs.

Why OEM Mitsubishi Wiring Beats Aftermarket

Aftermarket wiring diagrams often merge circuits or omit the note about hydraulic control type. Mitsubishi’s factory print has explicit wire gauge calls (e.g., 2A fuse F6 for the light switch) and correct color codes like Red/Green (R/G) and Red/Yellow (R/Y). I’ve seen a generic diagram label the 36/48V supply as “battery positive” with no fuse rating. That gets a guy killed. This document gives you the actual 325A fuse rating and the bus bar layout. Trust the factory print, not a copy that’s been redrawn three times.

Common Troubleshooting: Horn, Buzzer, Lift Lock

Three circuits that fail often on the FB-PNT series are the horn (sheet 09), the warning buzzer/back buzzer (sheet 10), and the lift lock solenoid (sheet 14). The manual shows the relay location for the PDS buzzer (H2) and back buzzer (H4). If the horn works but the buzzer doesn’t, check the relay coil voltage at connector H-09 on sheet 02. Don’t assume the relay is bad – trace the circuit using the OEM path. I watched a kid replace three relays on a FB20PNT when the issue was a broken wire at the armrest horn switch. The schematic shows that armrest horn switch (E) feeds back to sheet 09. Had he used this manual, he’d have fixed it in 20 minutes.

Who Needs This Manual?

If you’re maintaining a fleet of Mitsubishi FB13PNT through FB20PNT electric forklifts, this is your benchmark. DIY mechanics working on a single unit will also benefit – the diagrams are clean, the labeling is consistent, and the connector numbers match the actual truck. You don’t need to be an electrical engineer; you need to be able to read a circuit path and check voltage at a connector. The manual assumes you know how to use a multimeter, but it doesn’t assume you know the truck. It gives you the base reference.

Look at the related manuals for deeper coverage: Mitsubishi FB13PNT-FB20PNT 2011 Wiring Diagram for the exact same product, Mitsubishi FB-PNT Series Service Manual for repair procedures, and Mitsubishi FB-PNT/PN Series Forklift Service Manual for overhaul specs. For background on Automotive Wiring principles and Automotive Wiring standards, check the linked resources.

Does this wiring diagram cover the entire electrical system of the FB13PNT?

Yes – it includes all circuits from 36/48V power supply through to the connector pinouts. The 23 pages cover every major subsystem: power distribution, motor control, logic unit, input/output, CAN, lamps, horn, buzzer, and lift lock solenoid.

Is this a genuine Mitsubishi factory document or a reprint?

This is the original PDF released by Mitsubishi Heavy Industries in 2011. It has the official alteration history and sheet numbering. No third-party redrawing.

What models are included?

FB13PNT, FB15PNT, FB18PNT, and FB20PNT – all 2011 model year on the LUNA (MCFA) platform.

Can I use this to diagnose a no-crank condition on a FB20PNT?

Absolutely. Start at page 1 with the 36/48V supply and key switch circuit. The manual guides you through the motor control contactor logic and safety interlocks. One short answer: this is the right tool for that job.

If you’re tired of chasing ghosts with aftermarket diagrams, get the real factory print. Access the Factory Manual and put the right schematic on your bench.