The timer relay for glow plugs on a 86 Jetta is under the steering column. It is located in slot ten.
yes
glow plug timer is bad or the glow plugs them selves are bad
bad glow plugs or faulty glow plug timer module
there not the right wattage
Go to the library and get the manual; locate the appropriate instruction and follow it.
the glow plugs are located under the valvecovers should be 8 of them
There are no "spark plugs". The 4 on top of engine ( under the black or blue rubber looking harness) are your glow plugs. Then there are 3 to the right side of engine that are glow plug heaters for your engine coolant....At least that's what my mechanic showed me and how he explained it to me.
Next to the fuse box
Your glow plugs are not heating up. You may have bad glow plugs or relay. try turning on the key ( this should start the warming of the plugs and a light on the dash will come on letting you know it is ok to start if not the relay is bad) if no luck turn off the key and let it cycle again. if it is still difficult to start you may need new glow plugs.
I note the relay (part No NCL100040) is called an "ignition and glow plug heater relay". The 75 will usually start if you turn the key before the glow plugs have heated, therefore the glow plugs are probably only needed for cold starts. Glow plugs are not needed when a diesel engine is hot. The "ignition" reference may mean that some other circuit is controlled by this relay (obviously there is no conventional ignition as it is a diesel). FYI The part is also used on the Range Rover TD6 post 2002 An internet search suggest the cam sensor can cause starting problems and fault codes similar to a faulty glow plug relay.
Could be bad glow plugs.
against the bulkhead, next to the ecu