jensen wiring harness | eBay Find great deals on eBay for jensen wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. WIRE HARNESS FOR JENSEN VM9212N *PAY TODAY SHIPS TODAY* See more like this. Jensen Power Wire Harness for VM9424BT New 30313100. Brand New. $59. Buy It Surprised - Can a wiring harness make THAT much difference? Jan 05, 2018I removed the quarter pounders and the wiring harness, and dropped in a set of Laklin/Hansen single coils and the same wiring harness I used from the PJ above thinking that the orange drop would give me more room to adjust the tone knob. The bass now sounds absolutely terrible. Very very thin, and absolutely no punch.