Elite 1000/1500 Maz 13B Term S4/5 CAS Harn Only No Sub harn

Overview

Purpose-built CAS harness for Mazda 13B rotary engines running Series 4 and Series 5 distributor setups with Haltech Elite 1000 or 1500 ECUs. This essential termination harness eliminates the guesswork from wiring your CAS signal, delivering clean trigger inputs that are critical for proper ignition timing and fuel delivery on rotary applications.

Technical Specifications

• Part Number: HT-130333
• Application: Mazda 13B Series 4/5 CAS
• ECU Compatibility: Haltech Elite 1000/1500
• Configuration: Termination harness only (no sub harness)
• Construction: OEM-spec automotive grade wiring

Why You Need This

The Mazda 13B's CAS (Crank Angle Sensor) is absolutely critical for rotary engine management, and bodged wiring here will ruin an otherwise perfect build. This harness provides the correct termination for your Series 4 or 5 distributor's CAS signals, ensuring your Elite ECU receives clean, noise-free trigger patterns. Without proper signal conditioning, you'll face erratic timing, misfires, and potentially catastrophic engine damage from timing errors.

Common in RX-7 FC and FD builds, 13B engine swaps, and rotary conversions, this harness is essential whether you're running a street-tuned naturally aspirated setup or a high-boost turbo build. The factory CAS wiring often suffers from age-related degradation, corroded connections, and inadequate shielding that causes trigger noise. This purpose-built harness eliminates these issues with proper gauge wire, correct pin assignments, and robust construction that stands up to engine bay heat and vibration.

ECU & System Compatibility

Designed specifically for Haltech Elite 1000 and Elite 1500 ECUs when controlling Mazda 13B engines with Series 4 or Series 5 CAS distributors. This termination harness connects directly to your Elite's main harness, providing the correct signal conditioning for rotary trigger patterns. Contact our technical team to confirm compatibility with your specific engine configuration and Elite ECU variant.

What's in the Box

• Elite 1000/1500 CAS termination harness for Mazda 13B S4/S5
• Pre-terminated connections with correct pin assignments
• Technical installation notes

Complete Your Build

Most customers building Mazda rotary applications also require additional sensors, injection harnesses, and ignition components. Our technical team can recommend the complete harness package for your specific 13B build, whether it's an RX-7 restoration or a rotary swap project. With UK stock and expert pre-sales advice, we'll ensure you get the right combination of Elite ECU, harnesses, and sensors to make your rotary project reliable and tuneable from day one.