Why would my 1991 Navajo turn over but have no spark
Turns over but no spark no crank

For its first SUV, Mazda turned to Ford, which was a natural choice, since the two automakers have been linked for more than 25 years. The Mazda Navajo was a thinly disguised Ford Explorer, with a few minor changes to the exterior, such as a new grille and taillights. The Navajo was available in only one version -- a two-door model with a 155-horsepower, 4.0-liter V6 engine. A five-speed manual transmission was standard, while a four-speed automatic was optional. Standard features for the Navajo included a part-time four-wheel drive system developed by Ford and rear-wheel anti-lock brakes that operated only when the vehicle was in two-wheel-drive mode. Other standard features included tweed cloth seats, power brakes, power steering, power door locks, power exterior mirrors, 15-inch wheels, and an AM/FM stereo system. Options included a sunroof, air conditioning, leather seats, and a cassette player. The Mazda Navajo was a reliable, fun-to-drive vehicle, with a comfortable interior and good acceleration, according to drivers. Many of the vehicles now have high mileage, but for the most part drivers reported having only routine maintenance problems with the vehicles. However, a few drivers have reported that their vehicles needed frequent repairs, and that parts could be difficult to locate.
Turns over but no spark no crank
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I have recently replaced my altanator battery and negative terminal. I bought all parts brand new. Now when i try to start it it just clicks like theres no power but wont turn over. I also checked all of my fuses. They all seemed fine. Why wont it start????
Audio System
AM/FM radio
Brakes
ABS: rear-only
Comfort Features
Steering wheel trim: leather
Convenience Features
Steering wheel: tilt-only
Drivetrain
4WD Type: part time
Mirrors
Exterior mirrors: power
Seats
Front seat type: bucket · Upholstery: cloth
Windows
Front wipers: intermittent