Glow Plug Relay And Timer For 7.3 Idi T444e 4000 Series Trucks 6.9L/7.3L model engine(s).
Catalog Number: 4P10
Mounted on the rear of the intake manifold near the firewall, this relay controls the power running to the glow plugs. When the ignition is in the on position, the relay should pulse power to heat the glow plugs in short intervals. If your glow plugs are not working, this part may be the problem.