TEST 7: Making Sure The Radiator Fan Assembly Is Getting Power From The High Speed Relay
In this section, we're gonna' jumper terminals #77 and #79 of the high speed radiator fan relay socket (in the Power Distribution Center) and then make sure that battery power is available at female terminal #4 of the 4-wire connector (see photo above).
The wire that connects to terminal #4 is the yellow (YEL) wire of the connector.
NOTE: This test is done on the 4-wire connector with female terminals.
IMPORTANT: Do not jumper any other terminals of the relay socket than the ones indicated! Jumpering any other female terminals can damage the fuel injection computer.
These are the test steps:
- 1
Disconnect the radiator fan assembly's 4-wire connector.
- 2
Remove the high speed radiator fan motor relay from the Power Distribution Center.
- 3
Jumper together terminals #77 and #79 of the relay socket.
NOTE: The illustrations in TEST 4 will help you locate terminals #77 and #79 of the low speed radiator fan relay socket. - 4
Place your multimeter in Volts DC mode.
- 5
Probe female terminal #4 with the red multimeter test lead.
The YEL wire connects to female terminal #4. - 6
Connect the black multimeter test lead to the battery negative access point on the left strut tower.
- 7
Your multimeter should read 10 to 12 Volts DC.
Let's analyze your test result:
CASE 1: 10 to 12 Volts are present. This is the correct and expected test result.
Your next step is to make sure that Ground is present at female terminal number 2. For this test go to: TEST 9: Making Sure Ground Is Present At Female Terminal #2.
CASE 2: 10 to 12 Volts ARE NOT present. This test result lets you know that there is a problem with the yellow (YEL) wire between the connector and the Power Distribution Center.
The most likely cause of these missing 12 Volts is an open-circuit problem in the YEL wire.
Your next step is to check the continuity of the YEL wire between the Power Distribution Center and the 4-wire connector. The following wiring diagram will help you: Radiator Fan Circuit Wiring Diagram (2001-2006 2.4L DOHC Chrysler Sebring And Dodge Stratus).
TEST 8: Making Sure Ground Is Present At Female Terminal #1
In this section, we're gonna' make sure that female terminal number 1 is providing Ground to the radiator fan assembly.
To be a bit more specific: Female terminal #1 provides Ground to the low speed circuit of the radiator fan assembly.
To check for the presence of Ground we're gonna' do a simple multimeter voltage test.
These are the test steps:
- 1
Disconnect the radiator fan assembly's 4-wire connector.
- 2
Connect the red multimeter test lead to the battery positive access point on the Power Distribution Center.
- 3
Probe female terminal #1 with the black multimeter test lead.
The wire that connects to female terminal #1 is a black (BLK) wire. - 4
Your multimeter should read 10 to 12 Volts DC.
Let's analyze your test result:
CASE 1: Your multimeter registered 10 to 12 Volts. This is the correct test result and confirms that female terminal #1 is providing Ground.
You can conclude that the radiator fan assembly is bad and needs to be replaced if you have confirmed that:
- Both fan motors do not run in low speed when the low speed radiator fan relay is bypassed (TEST 3).
- Power is present in terminal #3 when the low speed radiator fan relay is bypassed (TEST 5).
- Ground is present in terminal #1 (this test section).
CASE 2: Your multimeter DID NOT register 10 to 12 Volts. Without Ground present at terminal #1 the fan motors will not run in low speed.
Your next step is to check the continuity of this Ground wire between the 4-wire connector and the battery negative (-) access point (located on the left strut tower). If the Ground wire is open, repair the problem and retest.
