I am fighting the exact opposite problem on a 96 Mystique. I cant get my fan to come on and i have traced it back to be a ground problem. Wherever the switch is, it turns the fan on and off by closing the ground side of circuit, and activating the relay. Start by checking your relay, and making sure its not stuck "OPEN" otherwise, the switch, (Where ever it may be) is bad.
The fog light switch on the 98 Mystique is on the headlight switch. When you turn on the headlights, pull the switch towards and the fog lights should come on. Here is a link to the owners manual for the 98 Mystique http://www.analogstereo.com/pdf/om/mystique_owners_manual_1998.pdf
on the back of the block behind the intake
There could be several reasons why a 1998 Mercury Mystique is overheating. The radiator may have a leak, the thermostat may be stuck, or the head gaskets could be blown.
There is no rad cap on a 98 mystique.The coolant is added through the overflow tank.
in the radiator or the thermostat housing.
thermi housing losers
I have a 1998 Mystique. Stay away or I'll call the police
common problem with 1998 mystique check engine light on
R134
Push the button on your transmission gear selector lever that is below the thumb switch that you push to select a gear
were is the iac locate on a 1999 mercury mystique
According to the 1998 Mercury Mystique Owner Guide : ( 61.5 litres / 16.2 U.S. gallons )