98 Jetta TDI Glow Plugs

coke · Post by **coke** » Tue Dec 11, 2007 7:31 pm

I need some clarification here from some more TDI savvy people. My father's 98 Jetta TDI has three 50 amp fuses. One in a plastic case in front of the battery, one on the firewall, and another one under the dashboard underneath a "53" relay.

Why 3 fuses, and which one(s) control the coolant glow plugs, and engine glow plugs? Also, is there a separate relay for the coolant plugs ?

MPalm · Post by **MPalm** » Thu Dec 27, 2007 10:50 am

On our Golf TDI the fuses on top of the battery are:
Alternator 150A
Main electrical 110A
Rad fan high speed 30A
ECU 50A
Diesel Glowplugs 50A
The above are of the same type as mk1-2 GP fuse

Then there are 3 normal fuses too on the top of the battery:
Rad fan, low speed 30A
ABS 30
ABS 30

ThatÂ´s all, the rest are normal 5-30Amps..

caveman · Post by **caveman** » Sun Mar 02, 2008 10:58 am

IF i remember, one on the firewall is for the glowplugs, the one near the coolant bottle is for the coolant fan control and i want to say the other is for the secondary air pump but that's for a gasser. If nobody else answers you, i'm about to dig out to my garage this afternoon and i will find my wiring books and tell you. MPalm list is for an A4 platform.

caveman · Post by **caveman** » Wed Mar 05, 2008 12:04 pm

Okay the other one which i believe is attached to a relay is for the coolant glow plugs. These are not the glow plugs for the motor,they are for the glow plugs which help heat the antifreeze that runs into the passanger compartment.