Where is the Overvoltage Protection Relay and is the fuse for it marked in the fuse box?

edit... also how many wires running to the red plastic thing on the back of the IP? I checked a 2 wire thing back there and all seems well with it.

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87 300D Turbo (still wondering about #14 head)
98 Buick Regal GS (one quick grocery gettr)
07 Honda CBR1000RR
04 Dodge Ram Laramie 4x4 CTD (heaven)
95 Dodge Ram 3500 CTD. Need snow plowed?