There are two Curt 4-pole wiring harness fits for your 1990 Mazda MPV Van, the part # C56175 that you purchased (thank you) and the powered-type unit # C59236 which can deliver higher current output of 5- and 7.5-amps per circuit. Harness # C56175 is not recommended for use with cars that have LED-type lighting because such high-efficiency lights use much lighter-gauge wiring and this light wiring can sometimes prevent enough current from flowing to the trailer lights.
The powered harness... view full answer...
The Draw-Tite hitch # 75507 you reference comes with all the hardware needed for a drill free installation. There are 3 different bolts that are used in this installation.
Bolt # 1 is a hex bolt which is 1/2-13 x 1-3/4 inches
Bolt # 2 is a hex bolt which is M10 x 1.25x40mm
Bolt # 3 is a carriage bolt that is 1/2-13 x 1-3/4 inches
The bolt that goes into your frame where there is an existing weld nut is bolt # 2. Many times on older vehicles corrosion builds up in the threads of the... view full answer...
It sounds like you picked up a 5 wire trailer connector rather than a 4 wire connector. A 4 wire trailer connector will only have a white wire for ground, brown for tail lights, green for right turn and stop and yellow for left turn and stop. The red wire on the connector that you purchased is most likely for reverse lights or a trailer with separate turn signals such as a motorcycle trailer. If you do not have reverse lights or separate turn and brake signals, then you can simply tie off... view full answer...
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