2.4 Wiper System¶
Type: Electronic Wiper Controller
Model: WS-51C
Manufacturer: Ron Francis Wiring
Product Page: Ron Francis WS-51C
Installation Manual: WS-51C Instructions
Mounting: Dash-mounted (integrated switch/controller)
Power Source: PMU OUT11 (15A capacity)
Overview¶
Ron Francis WS-51C replaces TIPM wiper functions. Provides delay/intermittent control for factory TJ wiper motor with integrated washer pump control and auto-wipe.
Wiring¶
| Circuit | Wire | Source | Destination | Notes |
|---|---|---|---|---|
| Module Power | 14 AWG | PMU OUT11 | WS-51C power input | Auto (ignition ON) |
| Module Ground | 14 AWG | WS-51C ground | Firewall ground | |
| Low Speed | Per WS-51C | WS-51C output | Wiper motor low terminal | |
| High Speed | Per WS-51C | WS-51C output | Wiper motor high terminal | |
| Park Switch | Per WS-51C | Wiper motor park | WS-51C park input | Auto-park detection |
| Washer Pump | Per WS-51C | WS-51C washer output | Factory washer pump | 3-5A, auto-wipe feature |
See PMU Outputs for PMU configuration.
Features¶
- Off / Mist / Delay / Low / High speeds
- Variable delay (1-20 seconds)
- Park position control
- Auto-wipe after washer spray
Outstanding Items¶
🔴 Critical (2)
- Gauge cluster power architecture: PMU OUT9 vs Critical Cabin PDU slots (#144) — Two mutually exclusive power architectures are documented for the Dakota Digital gauge system and must be reconciled before the cluster can be wired:
- Dedicated brushless radiator-fan controller + coolant temp sensor selection (#134) — Moving the GM 84100128 radiator fan off the PMU (OUT2+3+4) onto START-battery-direct power requires a standalone brushless-fan PWM controller with its own coolant temperature sensor, independent of the PMU and the J1939 bus.
High (7)
- iBooster pedal ratio verification against 1.25" booster stroke (#301) — Verify the brake pedal ratio (approximately 4:1 per owner notes, 03-06 TJ/LJ auto pedal) against the Bosch Gen 2 iBooster's 1.25" stroke so the pedal reaches full booster travel without the cylinder bottoming, with the 1-1/8" Wilwood master and Super Duty calipers at all four corners. Bench-measure on assembly.
- Gear position display via J1939 (Turbolamik TCU → BIM-01-2 → HDX) (#110) — Verify that transmission gear position actually reaches the HDX dash over J1939 — and is displayed — without a discrete gear-position sender.
- Brake Proportioning Valve (#60) — Select adjustable proportioning valve for the rear disc circuit (iBooster has no integral proportioning); size on assembly
- Catch Can Mounting Bracket Point (#58) — Select engine bracketry attachment point for Mishimoto MMOCC-UB universal bracket
- AMOT Cable Firewall Grommet (#57) — Assign dedicated firewall grommet for AMOT push-pull cable pass-through (must not share with other cables)
- AMOT T-Handle Mounting Location (#56) — Select dash mounting position for Midwest Control 30-144-TTL-BH-3 (reachable belted, away from accidental contact)
- AMOT-to-Intake Adapters (#55) — Source NPT-to-hose fittings sized to match measured turbo inlet OD
📋 Medium (3)
- Horn button → PMU In 1 wiring path through steering column (#152) — PMU In 1 (horn request) lists "steering wheel button" as its source, and the horn page puts the button on the steering-wheel PTT bracket — but no wire path, gauge, or connector is defined for how the button contact reaches PMU In 1 through/around the steering column. Street-legal item with an under-specified signal path.
- iBooster Wiring Harness Selection (#105) — Select the Bosch iBooster (Gen 2) wiring harness: Tulay's Gen 2 universal (plug-and-play) vs EVcreate Gen 2 connector kit (DIY). Decision pending donor arrival and pigtail condition inspection. Tracked in the purchase tracker but was missing a TBD issue.
- Axle Brake Flex Hose Length (#86) — DOT (FMVSS 106) braided-stainless extended-length flex at each axle - length blocked on axle + suspension selection (Section 10); size to full droop, do not cut until ride height fixed
🔍 Verify (5)
- iBooster standby current spec (ignition-off test value) (#151) — The engine-systems testing checklist includes "Verify iBooster standby current within spec (ignition OFF)" but no standby-current spec value is documented anywhere (the brake-booster page does not state one). The test step cannot be completed as written.
- WAIT-to-start lamp polarity: ECM Pin 35 active-low vs HDX input active-high (#150) — ECM Pin 35 (WAIT lamp, yellow) is active LOW (~0V when WAIT on, ~+12V off); the HDX indicator input is documented as active HIGH. If wired without resolving this, the cold-start indicator reads inverted — and the documented cold-start procedure depends entirely on watching the WAIT lamp.
- Restomod Air HVAC integration — verify A/C request wiring to PMU In 9 + blower draw (#146) — The factory TJ HVAC is replaced by a custom Restomod Air electronic HVAC kit (ordered, owner-confirmed 2026-06-11) — this resolves the original "no A/C request source post-PCM-delete" gap. Restomod Air kits are fully electronic (servo-driven doors, no vacuum), and the control head generates the A/C request: compressor-engage output (12V) → trinary pressure switch (30/406 psi cutouts) → PMU In 9. PMU logic then drives OUT17 → compressor clutch.
- AMOT 4261M 2.8″ intake air-path connection OD / reducer coupler to 2.125″ turbo inlet (#129) — The 4261M02 is a wafer butterfly valve that sleeves into a 2.8″ (71 mm) nominal intake duct; the AMOT datasheet (4261M_Air_Shutoff_Valve_0119rev2) publishes only nominal size (71 mm), bore (61 mm / 2.4″), and overall envelope — not the air-path spigot/wafer OD or clamp interface. The NPT thread in part number
4261M02A027-AA(actuator code 27) is the pneumatic control port, not the air path. - Grid Heater Current (#42) — Design value 80A - verify via element resistance measurement during installation (~0.15 ohm @ 12V).
Related Documentation¶
- PMU Outputs - OUT11 configuration