Intermittent/pulse wiper relay for front windscreen. Porsche 928 / 944 / 968 / 964 / 993

Intermittent/pulse wiper relay for the front windscreen wipers on many 1980s–1990s Porsche models. Controls the wiper intermittent (delay) function and the pulse/park behaviour — direct OEM fit for 928, 944, 968, 964 and 993 applications. Part number: 993.615.101.01 / 99361510101.



Fits:

• ·         Porsche 964 (911) C2 1989-93
• ·         Porsche 964 (911) C4 1989-93
• ·         Porsche 964 (911) RS 3.6L 1991-93
• ·         Porsche 964 (911) RS 3.8L 1991-93
• ·         Porsche 964 (911) TURBO 3.3L 1991-93
• ·         Porsche 964 (911) TURBO 3.6L 1991-93
• ·         Porsche 993 (911) C2 1994-97
• ·         Porsche 993 (911) C4 1994-97
• ·         Porsche 993 (911) RS 1994-97
• ·         Porsche 993 (911) C2S 1994-97
• ·         Porsche 993 (911) C4S 1994-97
• ·         Porsche 993 (911) TURBO 1994-96
• ·         Porsche 993 (911) GT2 1994-97
• ·         Porsche 993 (911) TURBO S 1994-97
• ·         Porsche 944 2.5L 8V 1982-87
• ·         Porsche 944 2.7L 8V 1988-89
• ·         Porsche 944S 2.5L 16V 1987-88
• ·         Porsche 944S2 3.0L 16V 1989-91
• ·         Porsche 944 Turbo 2.5L 8V 1985-88
• ·         Porsche 944 Turbo 2.5L 8V 1989-91
• ·         Porsche 944 Turbo S 2.5L 8V 1988
• ·         Porsche 968 3.0L 1992-94
• ·         Porsche 968 Sport 3.0L 1994-95
• ·         Porsche 968 CS 3.0L 1993-95
• ·         Porsche 968 Turbo S 3.0L 1993-94
• ·         Porsche 928 4.5L 1978-82
• ·         Porsche 928S 4.7L 1981-83
• ·         Porsche 928S2 4.7L 1984-86
• ·         Porsche 928S4 5.0L 1987-92
• ·         Porsche 928GT 5.0L 1989-91
• ·         Porsche 928GTS 5.4L 1992-95

Why replace this relay?

Loss of intermittent function — the most common symptom: intermittent (delay) wipe stops working while continuous speeds still operate. Many owners find the delay knob produces one sweep only or nothing.

Wipers stuck on / won’t stop — relay contacts or internal timer failure can leave wipers running or behaving unpredictably. Forum reports show both “wipers won’t turn off” and “wipers run continuously” symptoms tied to the relay or associated wiring.

Intermittent clicking / no response — relay may stop clicking or click but not switch the motor circuit due to worn contacts or internal failure. Swapping relay is a common test. 

Common issues & fault causes

Worn internal contacts / timer fault — relay internals degrade with age and use, causing loss of the pulse/interval function.

Corroded connector or fuse/relay carrier contacts — poor connection at the fuse/relay panel can mimic relay failure; cleaning contact points often fixes intermittent faults.

Related component faults — sometimes the wiper stalk/switch or the wiper motor itself causes similar symptoms; common troubleshooting is to test/swap the relay first, then check the stalk and motor.

Shorts / blown fuses — seized motor or wiring short can blow fuses or overload circuits; a failing relay can also cause abnormal current behaviour. 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99361510101

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