97 3.4l Underhood fuse # 28 blowing.

[proteks]

Its the a/c clutch fuse, 10 amp.
From my book that circuit has a diode, relay and clutch coil.
The resistance of the clutch coil is 2.4 ohms. Is that within specs?
Relay coil was 90 ohms. Near zero ohms resistance between contacts
when activated. Using a digital meter to check the diode: meter read .543v.
Replaced diode with general purpose diode and system works for awhile then
blows the fuse. Both diodes seem to end in the same result. The .543v I thought
may have been low and possible be bad? Would the compressor affect the coil
circuit enough to blow the fuse? Or is the coil the likely problem?
Thanks

[LMP]

2.4 ohms between coil ends means 5 to 6 amps would flow through coil....I find it a little high.... may be this is normal, I do not have specs (will check mine....) but that would not blow the fuse.
Diode is known as "free wheeling" means coil current will continue in closed circuit for a fraction of a second through diode when relays turns off: this is to avoid sparking due to coil self induction.
0.54 v is normal diode forward voltage. Should show open circuit in the other polarity.

[proteks]

Ground wire from coil reads good.
Does anybody have resistance value for the clutch coil?
Looks difficult to replace while on vehicle.
Anything else I should suspect?