Wiring Harnesses | AEM EMS-4 Wiring Harnesses. Patch/Extension Wiring Harnesses. 30 & 20 Amp Relay Wiring Kits. AQ-1 Data Logger Wiring Harnesses. Fuel/Ignition Controller AEM INFORMATION. Warranty/Return. Become a Dealer. Dealer Locator. About AEM Electronics. Contact Us. Career Opportunities. Sponsorship. New Products. Universal Core & Accessory Wiring Harnesses | AEM AEM’s Universal Core V8 Wiring engine harness (PN 30-3805) is terminated with Infinity Series 7 ECU connectors, power/ground leads and an OEM power distribution block with 5 relays and 7 fuses. Special care was taken to build redundancy into the power distribution system to increase overall reliability. Wiring & logging a GM IAT sensor | DSMtuners Sep 04, 2019Since you'll also need to connect a MAP sensor to go SD you'll also want to read Wiring & Logging a AEM 3 MAP Sensor if you haven't already. First you'll need to get a GM IAT sensor, harness, and a 3/8" NPT bung and have it welded into a UICP. ECMTuning sells it as a kit direct from their site, just click on this link.