Actron CP7665 Operations Instructions download pdf (Page 14)

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6. View reading on display.

• Typical solenoid / relay coil re-

sistances are 200Ω 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 200Ω.

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

1 ... 13 14 15 ... 32

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