New Holland T8010 Manual page 1331

Test point
2 Measure resistance from
antenna ground wire to
chassis ground.
Test point
1 Disconnect suspect
speaker electrical
connector.
Measure resistance
between the A and B
terminals of the speaker.
Section 55 - Electrical System - Chapter 1
G - Antenna Test
Good Reading
Less than 1 ohm
Antenna is good.
H - Speaker Resistance Test
Good Reading
Between 4 and 8 ohms
If good reading, speaker
good electrically.
55-1-150
Possible Cause of Bad Reading
Open circuit between antenna and
frame ground.
Possible Cause of Bad Reading
Bad circuit in speaker.