diff --git a/libraries/AP_Relay/AP_Relay.cpp b/libraries/AP_Relay/AP_Relay.cpp
index 02b9816a08..f9c7cbfa35 100644
--- a/libraries/AP_Relay/AP_Relay.cpp
+++ b/libraries/AP_Relay/AP_Relay.cpp
@@ -19,6 +19,11 @@
 #include <AP_Parachute/AP_Parachute.h>
 #include <AP_Camera/AP_Camera.h>
 
+#include <AP_Vehicle/AP_Vehicle_Type.h>
+#if APM_BUILD_TYPE(APM_BUILD_Rover)
+#include <AR_Motors/AP_MotorsUGV.h>
+#endif
+
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL
   #define RELAY1_PIN_DEFAULT 13
 
@@ -146,6 +151,14 @@ void AP_Relay::convert_params()
     }
 #endif
 
+#if APM_BUILD_TYPE(APM_BUILD_Rover)
+    int8_t rover_relay[] = { -1, -1, -1, -1 };
+    AP_MotorsUGV *motors = AP::motors_ugv();
+    if (motors != nullptr) {
+        motors->get_legacy_relay_index(rover_relay[0], rover_relay[1], rover_relay[2], rover_relay[3]);
+    }
+#endif
+
     // Find old default param
     int8_t default_state = 0; // off was the old behaviour
     const bool have_default = AP_Param::get_param_by_index(this, 4, AP_PARAM_INT8, &default_state);
@@ -165,29 +178,47 @@ void AP_Relay::convert_params()
 
         int8_t pin = 0;
         if (!_params[i].pin.configured() && AP_Param::get_param_by_index(this, param_index, AP_PARAM_INT8, &pin) && (pin >= 0)) {
-            // Copy old pin parameter
+            // Copy old pin parameter if valid
             _params[i].pin.set_and_save(pin);
         }
-        if (_params[i].pin < 0) {
-            // Don't enable if pin is invalid
-            continue;
-        }
-        // Valid pin, this is either due to the param conversion or default value
 
         // Work out what function this relay should be
+        AP_Relay_Params::Function new_fun;
         if (i == chute_relay) {
-            _params[i].function.set_and_save(int8_t(AP_Relay_Params::Function::parachute));
+            new_fun = AP_Relay_Params::Function::parachute;
 
         } else if (i == ice_relay) {
-            _params[i].function.set_and_save(int8_t(AP_Relay_Params::Function::ignition));
+            new_fun = AP_Relay_Params::Function::ignition;
 
         } else if (i == cam_relay) {
-            _params[i].function.set_and_save(int8_t(AP_Relay_Params::Function::camera));
+            new_fun = AP_Relay_Params::Function::camera;
+
+#if APM_BUILD_TYPE(APM_BUILD_Rover)
+        } else if (i == rover_relay[0]) {
+            new_fun = AP_Relay_Params::Function::brushed_reverse_1;
+
+        } else if (i == rover_relay[1]) {
+            new_fun = AP_Relay_Params::Function::brushed_reverse_2;
+
+        } else if (i == rover_relay[2]) {
+            new_fun = AP_Relay_Params::Function::brushed_reverse_3;
+
+        } else if (i == rover_relay[3]) {
+            new_fun = AP_Relay_Params::Function::brushed_reverse_4;
+#endif
 
         } else {
-            _params[i].function.set_and_save(int8_t(AP_Relay_Params::Function::relay));
+            if (_params[i].pin < 0) {
+                // Don't enable as numbered relay if pin is invalid
+                // Other functions should be enabled with a invalid pin
+                // This will result in a pre-arm promoting the user to resolve
+                continue;
+            }
+            new_fun = AP_Relay_Params::Function::relay;
 
         }
+        _params[i].function.set_and_save(int8_t(new_fun));
+
 
         // Set the default state
         if (have_default) {
diff --git a/libraries/AP_Relay/AP_Relay_Params.cpp b/libraries/AP_Relay/AP_Relay_Params.cpp
index 9ea593cea6..37b04e89d3 100644
--- a/libraries/AP_Relay/AP_Relay_Params.cpp
+++ b/libraries/AP_Relay/AP_Relay_Params.cpp
@@ -5,7 +5,16 @@ const AP_Param::GroupInfo AP_Relay_Params::var_info[] = {
     // @Param: FUNCTION
     // @DisplayName: Relay function
     // @Description: The function the relay channel is mapped to.
-    // @Values: 0:None,1:Relay,2:Ignition,3:Parachute,4:Camera
+    // @Values: 0:None
+    // @Values: 1:Relay
+    // @Values{Plane}: 2:Ignition
+    // @Values{Plane, Copter}: 3:Parachute
+    // @Values: 4:Camera
+    // @Values{Rover}: 5:Bushed motor reverse 1 throttle or throttle-left or omni motor 1
+    // @Values{Rover}: 6:Bushed motor reverse 2 throttle-right or omni motor 2
+    // @Values{Rover}: 7:Bushed motor reverse 3 omni motor 3
+    // @Values{Rover}: 8:Bushed motor reverse 4 omni motor 4
+
     // @User: Standard
     AP_GROUPINFO_FLAGS("FUNCTION", 1, AP_Relay_Params, function, (float)Function::none, AP_PARAM_FLAG_ENABLE),
 
diff --git a/libraries/AP_Relay/AP_Relay_Params.h b/libraries/AP_Relay/AP_Relay_Params.h
index 6e9105dbc7..29161adf32 100644
--- a/libraries/AP_Relay/AP_Relay_Params.h
+++ b/libraries/AP_Relay/AP_Relay_Params.h
@@ -24,6 +24,10 @@ public:
         ignition = 2,
         parachute = 3,
         camera = 4,
+        brushed_reverse_1 = 5,
+        brushed_reverse_2 = 6,
+        brushed_reverse_3 = 7,
+        brushed_reverse_4 = 8,
         num_functions // must be the last entry
     };