Yeah, and the key works like normal, no more touching wires together.
Everyone with an older Yota should do this mod, cost me $12, took me about 30 minutes to do & made a huge difference. The starter spins much faster now. The original design of the system is the cause, no starter relay means that the ignition switch carries the full load of voltage & over time builds resistance. I knew this was my problem because I had 12.4 volts at the battery, but only 11.2 at the starter signal wire when cranking. According to Marlin Crawler, anything over .5 volts drop is unacceptable.
I used a 40 amp 4 pin relay & 10 gauge wire with weatherproof female spade connectors for the mod. Wiring for the relay is terminal 30 to battery for full time hot, I chose to use an eye-let connector & bolt mine to the battery cable terminal on the starter. Terminal #85 on the relay goes to ground. #86 your original starter signal wire & #87 on the relay goes to the starter where the original signal wire was.
Relay ready to go
I mounted my relay on the passenger side fender well & grounded it throough the mounting hole.