Radiator fans do not turn on Dodge Grand Caravan or dodge caravan
How to check and repair
EASY but not likely
1 check the 40A fuse in the fuse box under the hood on the drivers side. The inside of the lid to the fuse box will tell you which one it is.
More difficult but a little more likely
Check the coolant temperature sensor at the top of the engine
- With the key OFF, disconnect wire harness connector from coolant temperature sensor usually right next to where the large radiator hose exits the top of the engine where the thermostat housing is:
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- Connect a high input impedance (digital) volt-ohmmeter to terminals A and B (Fig. 96). The ohmmeter should read as follows:
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- Normal operating temperature around 200°F ohmmeter should read approximately 700 to 1,000 ohms .
- Room temperature around 70°F ohmmeter should read approximately 7,000 to 13,000 ohms .
- Test the resistance of the wire harness between the PCM connector terminal 26 and the sensor harness connector. Also check for continuity between PCM connector terminal 43 and the sensor harness connector.
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- If the resistance is greater than 1 ohm , repair the wire harness as necessary.
26 – sensor harness = 0
43 – sensor harness = 0
Check the relay for the fans: (MOST LIKELY FAILURE AND MOST DIFFICULT)
If the Radiator fan control module has failed you will need to replace it with a new one there is no way to repair it.
To replace the module,
The radiator fan relay is located below the left front headlamp module. The headlamp module must be removed to access the relay.
- Open hood, disconnect and isolate the battery negative cable.
- Remove the left side headlamp bulb from the headlamp housing. Refer to Lighting and Horns.
- Remove the left headlamp module.
- Remove the cover over the relay.
- Disconnect the relay connector.
- Carefully drill out the two retaining rivets.
- Remove relay from vehicle.
CAUTION: The relay mounting location is designed to dissipate heat. Ensure the relay is properly attached to prevent relay “thermal” shutdown and relay damage, resulting in possible engine overheating.
For installation, reverse the above procedure using new rivets included with the solid state relay
To remove the headlamp
REMOVAL
- Release hood latch and open hood.
- From inside engine compartment, remove nuts holding headlamp module to radiator closure panel.
- Remove screw holding top of module to closure panel.
- Remove headlamp module from radiator closure panel.
- Disconnect wire connectors from back of headlamp module.
- Separate headlamp module from vehicle.
INSTALLATION
- Place headlamp module in position on vehicle.
- Connect wire connectors into back of headlamp module.
- Place headlamp module in position on radiator closure panel.
- Install nuts to hold headlamp module to radiator closure panel.
- Install screw to hold top of module to closure panel.
- Verify headlamp operation and alignment.
Be sure to inspect the connector for the module and for the fans for melting and burning, if you find any it must be repaired or the new components will fail.
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RADIATOR FAN RELAY (SOILD STATE) |
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CAV |
CIRCUIT |
FUNCTION |
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1 |
Z1 18BK |
GROUND |
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2 |
K173 18LG/DB |
RADIATOR FAN RELAY CONTROL |
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3 |
C23 12DG |
RADIATOR FAN RELAY OUTPUT |
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4 |
A16 12GY |
FUSED B(+) |
More complicated but thorough information:
I have a 1998 Dodge caravan and a p1698 troubleshooting code. Where should I start. Also a radiator fan relay switch that has a bad connection or bad switch. Where is the switch?
Submitted: 4 years ago.
Category: Dodge
Expert: Jerry replied 4 years ago.
Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
There is a fan motor relay, which there was a recall for on some.
No. 771
May, 1998
To: XXXXX XXXXX and Chrysler-Plymouth Dealers
Subject:
Customer Satisfaction Notification # XXXXX — Radiator Fan Relay and Reprogram Powertrain Control Module
Models:
1998 Model Year Dodge Caravan and Grand Caravan; Plymouth Voyager and Grand Voyager; and Chrysler Town & Country (NS) Vehicles Equipped With a 2.4L, 3.3L or 3.8L Engine (“B”, “G”,”R” or “L” in the 8th VIN Position) Built Through:
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November 26, 1997 (MDH 112623) at the St. Louis South Assembly Plant (“B” in the 11th VIN Position)
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December 1, 1997 (MDH 120109) at the Windsor Assembly Plant (“R” in the 11th VIN Position)
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The radiator fan relay on about 150,000 of the above listed vehicles, may not turn on the radiator cooling fans. This may cause the engine to overheat. To correct this condition, the radiator fan relay must be replaced and the Powertrain Control Module (PCM) must be reprogrammed (flashed).
On the trouble code,
Or go ask some of these folks….
How to fix a radiator control module of a dodge Gland Caravan 2000 – JustAnswer.