Actron AutoAnalyzer CP7665 - Manual (Page 14)

14
6. View reading on display.
• Typical solenoid / relay coil re-
sistances are 200
Ω
or less.
• Refer to vehicle service manual
for the device's resistance
range.
If meter overranges, turn multi-
meter rotary switch to next higher
range. (see Setting the Range
on page 6)
7. Test Results
Good Solenoid / Relay Coil: Dis-
play in Step 6 is within manufac-
turers specification.
Bad Solenoid / Relay Coil:
• Display in Step 6 is not within
manufacturers specifications.
• Display reads overrange on
every ohms range indicating an
open circuit.
NOTE: Some relays and sole-
noids have a diode placed across
the coil. To test this diode see
Testing Diodes on page 11.
1. Insert BLACK test lead into
COM test lead jack.
2. Insert RED test lead into
test lead jack.
3. Turn multimeter rotary switch
to 200
Ω
function.
Most solenoids and relay coil
resistances are less than 200
Ω
.
4. Connect BLACK test lead to
one side of coil.
5. Connect RED test lead to other
side of coil.
• If the reading is overrange -
The switch is open.
7. Repeat Step 6 to verify switch
operation.
Testing Solenoids
and Relays
This test checks to see if a solenoid
or relay has a broken coil. If the coil
tests good, it is still possible that the
relay or solenoid is defective. The
relay can have contacts that are
welded or worn down, and the sole-
noid may stick when the coil is ener-
gized. This test does not check for
those potential problems.
To test Solenoids and Relays (see
Fig. 16):
Relay or
Solenoid
Red
Black
Fig. 16