No , a 1997 Mercury Mountaineer is not designed to have a third row seat ( the 2002 and newer Mercury Mountaineer were designed to have a third row seat )
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A 1992 Ford Explorer was not designed to have third row seating The first model year that third row seating was available was the 2002
The power steering might whine on a 1998 Mercury Mountaineer because the pump or reservoir is low on fluid. Check the reservoir and add fluid to eliminate the whine. You may have a leak in the system.
On a 1997 Mercury Mountaineer : The engine oil filler tube for the 5.0 litre / 302 cubic inch V8 engine is on the valve cover of the engine , on the right side ( passenger side ) near the front of the valve cover
On a 1998 Mercury Mountaineer : Using a funnel , add the automatic transmission fluid through the automatic transmission fluid dipstick tube . It is located near the firewall , just to the right side ( passenger side ) of the engine , where the transmission is bolted to the rear of the engine . ( the type of transmission fluid to use should be engraved into the dipstick )
you need a rca adapter interface you can get one at car audio place or check eBay
positive wire to another positive wire
The low pressure port is the same place that you add Freon to your air conditioning system. The low pressure port will have a blue top.
On a 1998 Mercury Mountaineer : Both the 4.0 liter V6 engine and the 5.0 liter V8 engine have the power steering fluid reservoir located at the front of the engine near the vehicle battery * according to the Owner Guide , MERCON automatic transmission fluid is used as the power steering fluid
Assuming that you are referring to an automatic transmission- the only place to add fluid is through the transmission dipstick tube. Just be sure that your fluid is low before you add, because there may not be a drain plug (some had them, some didn't).
You can check the transmission fluid, there is a little window on the side of the transmission on the drivers side that shows the fluid level and you can also add transmission fluid on that same side. There is no dipstick to check the level.