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wire diagram for 1999 Ford F250 diesel glow plug relay
the glow plugs are located under the valvecovers should be 8 of them
how locate glow plug relay on 2008 Volvo diesel 2.0D
The 1991 Dodge diesel truck glow plug relay is located in the fuse box. The fuse box is located behind the battery box. The glow plug relay will be in the right upper corner of the box.
Inside cab, to the left of the steering column under the dash is the relay / fuse panel. On that panel is the glow plug relay.
On the motor
on top of engine on passenger side behind warm air relay they look the same but the glow plug relay is the shorter one
there are 8 glow plugs
under the manafold
The relay is behind the intake manifold near the firewall.
On the engine compartment side immediately next to the battery
Could be bad glow plugs.