Originally Posted by hohenwald48
I'm not aware of any Wranglers of any vintage that required fuse removal for flat towing.
Almost all Jeep Wranglers PRIOR to the JL *When equipped with an aux braking system* will require the removal of the Jeep's brake light fuse for correct operation. This includes TJ models (1996-2006) & JK models (2007-2018).
The Wrangler uses the same filament in the same bulb for both turn signal and brake lights. When driving the Jeep, the ECU "manages" the inherent conflicts that can occur, specifically, what to do if both the brake and turn signal are commanded at the same time. In this scenario, the turn-side light will continue to blink while the opposite side light remains constant bright.
However, when these Jeeps are being towed (and equipped with an aux braking device), the "conflict" is not managed. In other words, when the tow vehicle is commanding a blinking left turn light by sending a pulsed 12v signal to the light and then the tow vehicle also applies the brakes... most aux braking devices will pull/push the Jeep's brake pedal and the Jeep will send a constant 12v signal to the turn-side light. The effect is that the turn signal is effectively eliminated in favor of a constant (brake) light.
The remedy is a simple one. By removing the Jeep's brake light fuse while towing, you take away the capability for the Jeep to activate its own lights... and the conflict is eliminated.
The good news here for the op is that with the new JL Wranglers and all Gladiators, the ECU will enter a sleep mode about a minute after the last door is closed. In this low-power sleep mode, the electrical system is off and the Jeep will not try to activate its tail lights. There's no need to remove a fuse.
Our Cool Tech towing harness for the JL Wranglers and JT Gladiators was specifically designed for these applications. The system provides 100% (physical) isolation from the delicate Jeep electronics and there are no diodes to consume power or to be a potential failure point. All wiring connections are made inside the Jeep - isolated from the elements yet still employing 3M heat shrink connectors just like the OEM uses.