{"product_id":"6-pin-ignition-lock-cylinder-relay-switch-connector-cy7061-6-3-21-6-3mm","title":"6-Pin Ignition Lock Cylinder \u0026 Relay Switch Connector – CY7061-6.3-21 | 6.3mm High-Current","description":"\u003ch2\u003e6-Pin Ignition Lock Cylinder \u0026amp; Relay Switch Connector – CY7061-6.3-21 | 6.3mm High-Current\u003c\/h2\u003e\n\n\u003cp\u003eOEM-specification 6-pin connector for ignition lock cylinder switch and relay harness applications. Cross-references part number \u003cstrong\u003eCY7061-6.3-21\u003c\/strong\u003e. The 6.3mm terminal pitch is the automotive industry standard for high-current ignition switch circuits, providing the contact area and current capacity required for starter relay, KL15 ignition power, and KL30 permanent power circuits. Used across multiple vehicle platforms for ignition switch and relay harness connections. Available bare or with 15cm pre-wired leads.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Ignition Switch Connectors Fail\u003c\/h2\u003e\n\n\u003cp\u003eThe ignition switch connector is one of the highest-stress connectors in the vehicle. It carries the full ignition power load (KL15), the starter relay signal (KL50), and the permanent battery feed (KL30) — all simultaneously during engine cranking. The combination of high current, heat cycling, and vibration accelerates terminal oxidation. A corroded ignition switch connector causes a cascade of symptoms that are frequently misdiagnosed as a failed ignition switch, BCM, or immobiliser module:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntermittent no-start:\u003c\/strong\u003e Corrosion on the KL50 starter relay pin causes the starter relay not to energise, even though the ignition switch is mechanically functional.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmobiliser active with correct key:\u003c\/strong\u003e Corrosion on the BCM\/immobiliser signal pin (Pin 5) causes the BCM to lose the ignition switch signal, triggering the immobiliser even with the correct key.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eACC power loss:\u003c\/strong\u003e Corrosion on the KL75 accessory pin causes the radio, windows, and other ACC-switched circuits to lose power in the ACC position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition-switched circuits not powering up:\u003c\/strong\u003e Corrosion on the KL15 pin causes all ignition-switched circuits (fuel pump, ECU, sensors) to lose power, resulting in a no-start with no fault codes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e6-Pin Circuit Function – Complete Pin Map\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eCircuit Label\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eCurrent Load\u003c\/th\u003e\n\u003cth\u003eFailure Symptom if Corroded\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eKL30\u003c\/td\u003e\n\u003ctd\u003e+12V permanent battery power (always live)\u003c\/td\u003e\n\u003ctd\u003eHigh (up to 30A)\u003c\/td\u003e\n\u003ctd\u003eIgnition switch completely dead, no response in any position\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eKL15\u003c\/td\u003e\n\u003ctd\u003e+12V ignition power output (live in IGN position)\u003c\/td\u003e\n\u003ctd\u003eHigh (up to 20A)\u003c\/td\u003e\n\u003ctd\u003eECU, fuel pump, sensors not powering up — no-start, no fault codes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eKL50\u003c\/td\u003e\n\u003ctd\u003eStarter relay trigger signal (live in START position only)\u003c\/td\u003e\n\u003ctd\u003eLow (signal)\u003c\/td\u003e\n\u003ctd\u003eNo crank — engine won’t start, starter motor not engaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eKL75\u003c\/td\u003e\n\u003ctd\u003eAccessory power output (live in ACC and IGN positions)\u003c\/td\u003e\n\u003ctd\u003eMedium (up to 10A)\u003c\/td\u003e\n\u003ctd\u003eRadio, windows, accessories not working in ACC position\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eBCM\/Immobiliser\u003c\/td\u003e\n\u003ctd\u003eIgnition switch position signal to BCM \/ immobiliser module\u003c\/td\u003e\n\u003ctd\u003eLow (signal)\u003c\/td\u003e\n\u003ctd\u003eKey not recognised, immobiliser active, security light flashing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eKL31\u003c\/td\u003e\n\u003ctd\u003eGround \/ chassis earth return\u003c\/td\u003e\n\u003ctd\u003eHigh (shared return)\u003c\/td\u003e\n\u003ctd\u003eIgnition switch erratic, multiple intermittent faults across all positions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e6-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eCY7061-6.3-21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Pitch\u003c\/td\u003e\n\u003ctd\u003e6.3mm (automotive high-current standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003eUp to 30A per circuit (KL30\/KL15)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eHigh-temp nylon (PA66), heat-resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Material\u003c\/td\u003e\n\u003ctd\u003eCopper alloy, tin-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Option\u003c\/td\u003e\n\u003ctd\u003eBare connector \/ 15cm pre-wired leads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eIgnition lock cylinder switch harness, relay harness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSealing\u003c\/td\u003e\n\u003ctd\u003eNon-sealed (interior \/ dry environment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003e6.3mm vs 2.8mm – Why Terminal Pitch Matters for Ignition Circuits\u003c\/h2\u003e\n\n\u003cp\u003eThe 6.3mm terminal pitch is specifically designed for high-current automotive circuits. Compared to the 2.8mm pitch used for sensor signals, the 6.3mm terminal has approximately 5× the contact surface area, which is essential for the KL30 and KL15 circuits that carry the full ignition power load. Using a 2.8mm connector on a KL30 circuit would cause the terminal to overheat and fail within hours. Always verify the terminal pitch before ordering a replacement ignition switch connector.\u003c\/p\u003e\n\n\u003ch2\u003eDiagnostic Guide – Ignition Switch Connector Fault Isolation\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSymptom\u003c\/th\u003e\n\u003cth\u003eLikely Corroded Pin\u003c\/th\u003e\n\u003cth\u003eTest Method\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo crank, no click from starter\u003c\/td\u003e\n\u003ctd\u003ePin 3 (KL50)\u003c\/td\u003e\n\u003ctd\u003eMeasure voltage at Pin 3 in START position — should be +12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo crank, relay clicks but starter doesn’t engage\u003c\/td\u003e\n\u003ctd\u003ePin 1 (KL30) or Pin 6 (KL31)\u003c\/td\u003e\n\u003ctd\u003eMeasure voltage drop across Pin 1 and Pin 6 under load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eECU not powering up, no fault codes\u003c\/td\u003e\n\u003ctd\u003ePin 2 (KL15)\u003c\/td\u003e\n\u003ctd\u003eMeasure voltage at Pin 2 in IGN position — should be +12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRadio \/ windows not working in ACC\u003c\/td\u003e\n\u003ctd\u003ePin 4 (KL75)\u003c\/td\u003e\n\u003ctd\u003eMeasure voltage at Pin 4 in ACC position — should be +12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImmobiliser active with correct key\u003c\/td\u003e\n\u003ctd\u003ePin 5 (BCM signal)\u003c\/td\u003e\n\u003ctd\u003eCheck BCM communication with scan tool — look for U-codes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMultiple intermittent faults across all positions\u003c\/td\u003e\n\u003ctd\u003ePin 6 (KL31 ground)\u003c\/td\u003e\n\u003ctd\u003eMeasure resistance from Pin 6 to chassis ground — should be \u0026lt;0.1Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eMulti-brand ignition lock cylinder switch harness (6-pin, 6.3mm pitch)\u003c\/li\u003e\n\u003cli\u003eRelay harness builds requiring 6-pin 6.3mm high-current connectors\u003c\/li\u003e\n\u003cli\u003eAftermarket ignition switch upgrade harnesses\u003c\/li\u003e\n\u003cli\u003eCustom wiring harness builds for engine swaps and restorations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: My car cranks but won’t start and has no fault codes — could it be the ignition switch connector?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A corroded KL15 pin (Pin 2) in the ignition switch connector causes the ECU, fuel pump, and sensors to lose power simultaneously. The ECU cannot log fault codes because it has no power. This is one of the most commonly misdiagnosed no-start conditions — the engine cranks because the starter circuit (KL50, Pin 3) is on a separate pin and may still be functional. Inspect the 6-pin ignition connector before replacing the ECU or fuel pump.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between KL15 and KL30?\u003c\/strong\u003e\u003cbr\u003eA: KL30 (Pin 1) is the permanent battery feed — it is always live regardless of ignition position. KL15 (Pin 2) is the ignition-switched feed — it is only live when the ignition is in the ACC or IGN position. KL50 (Pin 3) is only live in the START position to trigger the starter relay.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this connector for a relay harness?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The 6.3mm pitch and high-current rating make this connector suitable for relay harness applications requiring up to 30A per circuit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are terminals included?\u003c\/strong\u003e\u003cbr\u003eA: Yes, terminals are included with all variants.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"with 15cm 14awg \/ 1 Pcs","offer_id":47838254891253,"sku":"14:350686#with 15cm 14awg;380:4#1 Pcs","price":56.54,"currency_code":"USD","in_stock":true},{"title":"with Pin \/ 1 Pcs","offer_id":47838254924021,"sku":"14:350850#with Pin;380:4#1 Pcs","price":19.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/S75d95e714c6042feaaa8e43a936662512.webp?v=1773728216","url":"https:\/\/www.csldmcml.com\/products\/6-pin-ignition-lock-cylinder-relay-switch-connector-cy7061-6-3-21-6-3mm","provider":"Cable Parts Online","version":"1.0","type":"link"}