On the 98, there is no block heater installed right out of the factory, so therefor, there won't be a plug. If you want a block heater installed, you can get ones that either magnet or glue to the bottome of the oil pan. I believe that this is the only option for the passat.
thermostat stuck
Block heaters on S-Series 1.9L engines are an option, not a factory offering. It is an external heater that bolts up to the front of the block next to the exhaust manifold. Earlier blocks (91-98) have a slightly longer heater than later (99-01) blocks because of an additional rib in the block casting.
they are located on either side of the block
The intake heater is the square block between the air horn and the intake manifold.
Check your coolant level. It may be critically low.
Its as simple as getting a flush connector from the parts store and looping the heater hoses using the connector as a bridge. this will buy you time to get the core replaced If you're going to do that much work, just replace the heater core. If you're hesitating because heater cores are "always" deep inside the dash, and take huge effort to get to - fear not! The heater core on the Windstars are really easy to get to and replace! See "Related Questions" below for more
No - they are not.
In the 1991 Oldsmobile Delta 98 Regency, the block heater is typically located on the engine block, near the lower part of the engine, usually on the passenger side. It is a small, cylindrical device that may be positioned near the oil pan or freeze plug area. To access it, you might need to look underneath the vehicle or remove any engine covers. If you're having trouble locating it, consulting the owner's manual or a repair manual for your specific model can provide additional guidance.
how to change heater core in 98 suburban
It should be under the spark plug wires connector block.
Maybe, 95 windstar has a different plug for transmission shift and the netrual safety switch ,But the plug for the trans can be changed,also you must have both in front of you to compare.95-97 ,98-01,your trans is an AX4N and uses syn fluild,,the car computer makes the trans shift.95 is an AX4S,I think it will work but as always you will have things to deal with.