---
title: ZF Transmission Shifter Communication & Park Lever Troubleshooting
description: ZF, Transmisson
---

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# ZF Transmission Shifter Communication & Park Lever Troubleshooting

## Production Action Required Important: Ensure all ZF transmissions leave production in PARK. The park release lever must be positioned as shown in the reference image/assembly documentation under: "Proper Position for Park Release Lever Disengaged" Failure to ship transmissions with the park release lever in the correct position may result in shifter communication concerns and flashing LED conditions.

***Warranty Troubleshooting Procedure***

**Condition A**

**Customer reports:**

- Shifter LEDs completely off, OR
- Shifter LEDs intermittently flicker

**Verify the following at the shifter with the key ON:**

- Red wire: **12V Power**
- Black wire: **Ground**
- Pink wire: **12V Ignition**

If all three circuits are verified:

**Action:**

- Have the customer swap the two CAN wires at the bulkhead connector.
- These are the **two striped wires** entering the **12-position bulkhead connector**.

---

**Condition B**

**After swapping the CAN wires:**

- Shifter LEDs now illuminate
- LEDs are flashing

**Action:**

- Inspect for a park release lever issue.
- Verify the park release lever is in the correct position:

---

**Contacting BluPrint Engines Support**

If:

1. Power, Ground, and Ignition circuits have been verified,
2. CAN wires have been swapped at the bulkhead,
3. Park release lever position has been checked,

and the issue still persists:

**Contact BluePrint Engines Support Team**

308-236-1050

warranty@blueprintengines.com

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