Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1985 Renault Sportwagon AutomaticFACTORY OEM SERVICE PROCEDURE
THERMO Time Switch
- Remove thermo time switch and install plug to prevent loss of coolant. Cool thermo time switch by immersing in cold water. Connect positive wire of switch to a test lamp and battery positive terminal. Connect battery negative terminal to switch body. Test lamp should glow. See Fig 1 .
- Insert thermometer in water and gradually heat water. Test lamp should glow until temperature reaches 88-102°F (31-39°C). If switch does not respond as outlined, continue testing as follows:
- Cool switch to temperature below that stamped on side of switch. Connect ohmmeter between terminals shown in table and note readings. Heat switch to temperature above 104°F (40°C) and again note readings in table. If readings are not to specifications, replace thermo time switch.
THERMO TIME SWITCH RESISTANCE
| Temperature: °F (°C) | Terminal Nos. | Ohms |
|---|---|---|
| Below 86 (30) | G & Ground | 25-40 |
| Below 86 (30) | W & Ground | 0 |
| Below 86 (30) | G & W | 25-40 |
| Above 104 (40) | G & Ground | 50-80 |
| Above 104 (40) | W & Ground | 100-160 |
| Above 104 (40) | G & W | 50-80 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.